diff --git a/package.json b/package.json
index 239b93f..5dbaef7 100644
--- a/package.json
+++ b/package.json
@@ -41,32 +41,32 @@
     "bluebird": "^3.5.5",
     "classnames": "^2.2.6",
     "codecov": "^3.5.0",
-    "gatsby": "^2.13.57",
-    "gatsby-link": "^2.2.4",
-    "gatsby-plugin-catch-links": "^2.1.2",
+    "gatsby": "^2.13.62",
+    "gatsby-link": "^2.2.5",
+    "gatsby-plugin-catch-links": "^2.1.3",
     "gatsby-plugin-feed": "^2.3.6",
     "gatsby-plugin-flow": "^1.1.2",
     "gatsby-plugin-google-gtag": "^1.1.4",
     "gatsby-plugin-manifest": "^2.2.5",
     "gatsby-plugin-netlify": "^2.1.4",
     "gatsby-plugin-netlify-cms": "^4.1.6",
-    "gatsby-plugin-offline": "^2.2.5",
+    "gatsby-plugin-offline": "^2.2.6",
     "gatsby-plugin-optimize-svgs": "^1.0.3",
     "gatsby-plugin-react-helmet": "^3.1.3",
-    "gatsby-plugin-sass": "^2.1.6",
+    "gatsby-plugin-sass": "^2.1.8",
     "gatsby-plugin-sharp": "^2.2.11",
     "gatsby-plugin-sitemap": "^2.2.6",
     "gatsby-remark-autolink-headers": "^2.1.3",
     "gatsby-remark-copy-linked-files": "^2.1.5",
     "gatsby-remark-external-links": "0.0.4",
-    "gatsby-remark-images": "^3.1.8",
+    "gatsby-remark-images": "^3.1.11",
     "gatsby-remark-katex": "^3.1.2",
     "gatsby-remark-prismjs": "^3.3.5",
     "gatsby-remark-relative-images": "^0.2.3",
     "gatsby-remark-responsive-iframe": "^2.2.4",
     "gatsby-remark-smartypants": "^2.1.2",
     "gatsby-source-filesystem": "^2.1.9",
-    "gatsby-transformer-remark": "^2.6.12",
+    "gatsby-transformer-remark": "^2.6.14",
     "gatsby-transformer-sharp": "^2.2.6",
     "invariant": "^2.2.4",
     "katex": "^0.10.2",
diff --git a/yarn.lock b/yarn.lock
index 71ca93d..3436490 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2099,6 +2099,14 @@ aws4@^1.8.0:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.8.0.tgz#f0e003d9ca9e7f59c7a508945d7b2ef9a04a542f"
 
+axios@^0.19.0:
+  version "0.19.0"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.19.0.tgz#8e09bff3d9122e133f7b8101c8fbdd00ed3d2ab8"
+  integrity sha512-1uvKqKQta3KBxIz14F2v06AEHZ/dIoeKfbTRkK1E5oqjDnuEerLmYTgJB5AiQZHJcljpg1TuRzdjDR06qNk0DQ==
+  dependencies:
+    follow-redirects "1.5.10"
+    is-buffer "^2.0.2"
+
 axobject-query@^2.0.2:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/axobject-query/-/axobject-query-2.0.2.tgz#ea187abe5b9002b377f925d8bf7d1c561adf38f9"
@@ -3851,7 +3859,7 @@ debug@2, debug@2.6.9, debug@^2.2.0, debug@^2.3.3, debug@^2.6.0, debug@^2.6.3, de
   dependencies:
     ms "2.0.0"
 
-debug@3.1.0, debug@~3.1.0:
+debug@3.1.0, debug@=3.1.0, debug@~3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
   dependencies:
@@ -5423,6 +5431,13 @@ focus-group@^0.3.1:
   version "0.3.1"
   resolved "https://registry.yarnpkg.com/focus-group/-/focus-group-0.3.1.tgz#e0f32ed86b0dabdd6ffcebdf898ecb32e47fedce"
 
+follow-redirects@1.5.10:
+  version "1.5.10"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.10.tgz#7b7a9f9aea2fdff36786a94ff643ed07f4ff5e2a"
+  integrity sha512-0V5l4Cizzvqt5D44aTXbFZz+FtyXV1vrDN6qrelxtfYQKW0KO0W2T/hkE8xvGa/540LkZlkaUjO4ailYTFtHVQ==
+  dependencies:
+    debug "=3.1.0"
+
 follow-redirects@^1.0.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.7.0.tgz#489ebc198dc0e7f64167bd23b03c4c19b5784c76"
@@ -5570,10 +5585,10 @@ fuzzy@^0.1.1:
   version "0.1.3"
   resolved "https://registry.yarnpkg.com/fuzzy/-/fuzzy-0.1.3.tgz#4c76ec2ff0ac1a36a9dccf9a00df8623078d4ed8"
 
-gatsby-cli@^2.7.29:
-  version "2.7.29"
-  resolved "https://registry.yarnpkg.com/gatsby-cli/-/gatsby-cli-2.7.29.tgz#326caf669b1e860aafae8dfe76f46538cd7bfa74"
-  integrity sha512-6GDRZUVaB7nYi3aQi9UjISxsuMCsgvqpPTOJ81H6rxbxGOh9pGKzomO4lEPOI92xmDdoRSL5TlKj28xEWLWRNA==
+gatsby-cli@^2.7.30:
+  version "2.7.30"
+  resolved "https://registry.yarnpkg.com/gatsby-cli/-/gatsby-cli-2.7.30.tgz#201b7e7eab147a31e488f9faa3108fe516b76aae"
+  integrity sha512-xHl8oYM+NipEFv5zlDTPYSoMnP0qq0+VCzZ2yvrxh9E0oaFXBuM3BrCz4C3iDoZygsCtkXD4lzNTyTYZ0LAr9Q==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     "@babel/runtime" "^7.0.0"
@@ -5627,9 +5642,10 @@ gatsby-graphiql-explorer@^0.2.3:
   dependencies:
     "@babel/runtime" "^7.0.0"
 
-gatsby-link@^2.2.4:
-  version "2.2.4"
-  resolved "https://registry.yarnpkg.com/gatsby-link/-/gatsby-link-2.2.4.tgz#8846130b3829e0c9c62d11d924ba63e98e07c93d"
+gatsby-link@^2.2.5:
+  version "2.2.5"
+  resolved "https://registry.yarnpkg.com/gatsby-link/-/gatsby-link-2.2.5.tgz#d2d2a1a75447b622861e5835cd612ae1de80b749"
+  integrity sha512-qaQZZAXi6D7paxTV7VAl2P3WKcdoFosLLTCdUTWi50joNUhIxNbOf5CukQ3SuI4O1tuoP3usJsS5XhuX4+prqQ==
   dependencies:
     "@babel/runtime" "^7.0.0"
     "@types/reach__router" "^1.0.0"
@@ -5648,9 +5664,10 @@ gatsby-page-utils@^0.0.5:
     micromatch "^3.1.10"
     slash "^1.0.0"
 
-gatsby-plugin-catch-links@^2.1.2:
-  version "2.1.2"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-catch-links/-/gatsby-plugin-catch-links-2.1.2.tgz#f7e04e2b390341ba4b1f8f0e12d4bcf78b1e542d"
+gatsby-plugin-catch-links@^2.1.3:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-catch-links/-/gatsby-plugin-catch-links-2.1.3.tgz#f2c136caf5f4d3ac7be8efdd0cd6df4b7e6ad405"
+  integrity sha512-xGkthFBud8N0/wj7dziGBmVZp8yrtfqkmQ9inRCMug4Uvl4jNQ5T35BwqrKbJOXyjSIm5Z7TDx5pm/Pu4XrtQQ==
   dependencies:
     "@babel/runtime" "^7.0.0"
     escape-string-regexp "^1.0.5"
@@ -5712,10 +5729,10 @@ gatsby-plugin-netlify@^2.1.4:
     lodash "^4.17.14"
     webpack-assets-manifest "^3.0.2"
 
-gatsby-plugin-offline@^2.2.5:
-  version "2.2.5"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-offline/-/gatsby-plugin-offline-2.2.5.tgz#65a2ce3ccabe8cf7e6763be07a4d51b8fdd65ca6"
-  integrity sha512-BE5F+LU1bPv25dYsHMQy6l2NaikDRP/znwFl4pQ7nvsJeqZHT7MkmYteZO8NC+MQPQKYXoEIxbhrfoRM8oBkLw==
+gatsby-plugin-offline@^2.2.6:
+  version "2.2.6"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-offline/-/gatsby-plugin-offline-2.2.6.tgz#2f8020c51dbb02c4496670d5dde46a2989b30856"
+  integrity sha512-0RceQWXt39SYukw5mxUpiv8X1YOWlGzJ2WWRYaNaECB/63fislkclN8dDAP22hLIV2Cr/cHiiwc4xc/lXf65rg==
   dependencies:
     "@babel/runtime" "^7.0.0"
     cheerio "^1.0.0-rc.2"
@@ -5751,10 +5768,10 @@ gatsby-plugin-react-helmet@^3.1.3:
   dependencies:
     "@babel/runtime" "^7.0.0"
 
-gatsby-plugin-sass@^2.1.6:
-  version "2.1.6"
-  resolved "https://registry.yarnpkg.com/gatsby-plugin-sass/-/gatsby-plugin-sass-2.1.6.tgz#ba8d6d80c7da0494cf79df483b92fe0abf15ecb5"
-  integrity sha512-sh7uCGeUgQSLVdocC6mocEfBjfkfy3bQb+eXQ9QeoGlbhLSv5oP1fVmRfwWeQlCijI49LpzKe5qlahRTZXlBwQ==
+gatsby-plugin-sass@^2.1.8:
+  version "2.1.8"
+  resolved "https://registry.yarnpkg.com/gatsby-plugin-sass/-/gatsby-plugin-sass-2.1.8.tgz#6b26f716f26e58bee42fa45458eb7812f4fe25bb"
+  integrity sha512-yPjDL5iALoFOsdy/Iuxmt/vh4+XrYrVkM3leBMMnVLtR+dqHK1953LeCnrb+Ps98sdZO5oS2FKPYnaQFXqie6A==
   dependencies:
     "@babel/runtime" "^7.0.0"
     sass-loader "^7.0.1"
@@ -5834,12 +5851,13 @@ gatsby-remark-external-links@0.0.4:
     unist-util-find "^1.0.1"
     unist-util-visit "^1.1.3"
 
-gatsby-remark-images@^3.1.8:
-  version "3.1.8"
-  resolved "https://registry.yarnpkg.com/gatsby-remark-images/-/gatsby-remark-images-3.1.8.tgz#64491e00076881feff9ea27bf44fabf93f8a0c85"
-  integrity sha512-ZfK5RYf1SKJociYfeCgXfzQLBm/15PBzT5D4J60DbGhqgR9MdiLR5ROU2TakSIDdQOdBU6p93zDAO9LkPqvpOA==
+gatsby-remark-images@^3.1.11:
+  version "3.1.11"
+  resolved "https://registry.yarnpkg.com/gatsby-remark-images/-/gatsby-remark-images-3.1.11.tgz#0a11d8f11f99a90891f116423a9882e0cee0d3c0"
+  integrity sha512-k3PCnR43RGtar0XTq3g5Sa/rUGV495FF6O9+wkLOj0++LX4jc6jmFURokfBMutGTUOLOeNTKZSFt2C+6dakfeA==
   dependencies:
     "@babel/runtime" "^7.0.0"
+    chalk "^2.4.2"
     cheerio "^1.0.0-rc.2"
     is-relative-url "^2.0.0"
     lodash "^4.17.14"
@@ -5943,10 +5961,10 @@ gatsby-telemetry@^1.1.11:
     stack-utils "1.0.2"
     uuid "3.3.2"
 
-gatsby-transformer-remark@^2.6.12:
-  version "2.6.12"
-  resolved "https://registry.yarnpkg.com/gatsby-transformer-remark/-/gatsby-transformer-remark-2.6.12.tgz#8467e0751127024204286711ae76f0dc9f574f9c"
-  integrity sha512-ywKxC4b1Oc3dXuGDTRCXC7xO0Bt+S6GXQH/eTE+HXQE098tDlPu5lSC5MUm9pQcFLVXcvg/gaTL5axeCMEEayw==
+gatsby-transformer-remark@^2.6.14:
+  version "2.6.14"
+  resolved "https://registry.yarnpkg.com/gatsby-transformer-remark/-/gatsby-transformer-remark-2.6.14.tgz#6c2f6944b7d66414b808bd71622f2c3f06b14452"
+  integrity sha512-5GACTAFiw6R7eOLNBJsuoP1ZGiSxhSAXx/6y2RgKjkmT6jxKOalZfjKdrs1Es1gFkQrRoc/ghEhIGKs/3oPaww==
   dependencies:
     "@babel/runtime" "^7.0.0"
     bluebird "^3.5.0"
@@ -5983,10 +6001,10 @@ gatsby-transformer-sharp@^2.2.6:
     semver "^5.6.0"
     sharp "^0.22.1"
 
-gatsby@^2.13.57:
-  version "2.13.57"
-  resolved "https://registry.yarnpkg.com/gatsby/-/gatsby-2.13.57.tgz#21fbe58304916fe0bfaba1c823f29bf7adabc12c"
-  integrity sha512-glckm9KFVwghlBQt/5B0NEu1ogMa/K0noe1+M6b/sP535YcbCEm35pApmeBIM1N55rkI2SB2Pd2CjijnqDjTnQ==
+gatsby@^2.13.62:
+  version "2.13.62"
+  resolved "https://registry.yarnpkg.com/gatsby/-/gatsby-2.13.62.tgz#ed2b5fc59199383c32f0ba6d64414a46452f7802"
+  integrity sha512-Q/hIwFJlQ2nC5ICenYQHk8uP3Pqbl/Ikq4Na5OS+3vnBkV19Yc4dgPIKc/DxOmIpgEfn6FQW15OHjoEXmPygew==
   dependencies:
     "@babel/code-frame" "^7.0.0"
     "@babel/core" "^7.0.0"
@@ -6001,6 +6019,7 @@ gatsby@^2.13.57:
     "@reach/router" "^1.1.1"
     address "1.0.3"
     autoprefixer "^9.6.0"
+    axios "^0.19.0"
     babel-core "7.0.0-bridge.0"
     babel-eslint "^9.0.0"
     babel-loader "^8.0.0"
@@ -6044,10 +6063,10 @@ gatsby@^2.13.57:
     flat "^4.0.0"
     fs-exists-cached "1.0.0"
     fs-extra "^5.0.0"
-    gatsby-cli "^2.7.29"
+    gatsby-cli "^2.7.30"
     gatsby-core-utils "^1.0.4"
     gatsby-graphiql-explorer "^0.2.3"
-    gatsby-link "^2.2.4"
+    gatsby-link "^2.2.5"
     gatsby-plugin-page-creator "^2.1.5"
     gatsby-react-router-scroll "^2.1.3"
     gatsby-telemetry "^1.1.11"
@@ -6087,7 +6106,7 @@ gatsby@^2.13.57:
     raw-loader "^0.5.1"
     react-dev-utils "^4.2.3"
     react-error-overlay "^3.0.0"
-    react-hot-loader "^4.12.5"
+    react-hot-loader "^4.12.11"
     redux "^4.0.0"
     redux-thunk "^2.3.0"
     semver "^5.6.0"
@@ -7396,7 +7415,7 @@ is-buffer@^1.1.4, is-buffer@^1.1.5, is-buffer@~1.1.1:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
 
-is-buffer@^2.0.0, is-buffer@~2.0.3:
+is-buffer@^2.0.0, is-buffer@^2.0.2, is-buffer@~2.0.3:
   version "2.0.3"
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-2.0.3.tgz#4ecf3fcf749cbd1e472689e109ac66261a25e725"
 
@@ -11439,7 +11458,21 @@ react-helmet@^5.2.1:
     react-fast-compare "^2.0.2"
     react-side-effect "^1.1.0"
 
-react-hot-loader@^4.12.5, react-hot-loader@^4.8.0:
+react-hot-loader@^4.12.11:
+  version "4.12.11"
+  resolved "https://registry.yarnpkg.com/react-hot-loader/-/react-hot-loader-4.12.11.tgz#06bd618d0a7343c8afa4a31206844f651193bae5"
+  integrity sha512-ySsg1hPwr/5dkZCJVp1nZRbwbpbEQ+3e2+bn/D681Wvr9+o+5bLKkTGq0TXskj8HgCS3ScysXddOng9Cg+JKzw==
+  dependencies:
+    fast-levenshtein "^2.0.6"
+    global "^4.3.0"
+    hoist-non-react-statics "^3.3.0"
+    loader-utils "^1.1.0"
+    prop-types "^15.6.1"
+    react-lifecycles-compat "^3.0.4"
+    shallowequal "^1.1.0"
+    source-map "^0.7.3"
+
+react-hot-loader@^4.8.0:
   version "4.12.8"
   resolved "https://registry.yarnpkg.com/react-hot-loader/-/react-hot-loader-4.12.8.tgz#90ecf2ef7d4005e110292760f135c95177e804c7"
   dependencies: