fix(deps): update gatsby

package.json

@@ -41,7 +41,7 @@
     "bluebird": "^3.7.2",
     "classnames": "^2.2.6",
     "codecov": "^3.8.0",
-    "gatsby": "^2.24.85",
+    "gatsby": "^2.24.88",
     "gatsby-link": "^2.4.16",
     "gatsby-plugin-catch-links": "^2.3.15",
     "gatsby-plugin-feed": "^2.5.19",
@@ -49,7 +49,7 @@
     "gatsby-plugin-google-gtag": "^2.1.13",
     "gatsby-plugin-manifest": "^2.4.35",
     "gatsby-plugin-netlify": "^2.3.24",
-    "gatsby-plugin-netlify-cms": "^4.3.16",
+    "gatsby-plugin-netlify-cms": "^4.3.17",
     "gatsby-plugin-offline": "^3.2.37",
     "gatsby-plugin-optimize-svgs": "^1.0.4",
     "gatsby-plugin-react-helmet": "^3.3.14",
@@ -65,9 +65,9 @@
     "gatsby-remark-relative-images": "^2.0.2",
     "gatsby-remark-responsive-iframe": "^2.4.17",
     "gatsby-remark-smartypants": "^2.3.13",
-    "gatsby-source-filesystem": "^2.3.35",
+    "gatsby-source-filesystem": "^2.3.37",
     "gatsby-transformer-remark": "^2.8.46",
-    "gatsby-transformer-sharp": "^2.5.19",
+    "gatsby-transformer-sharp": "^2.5.20",
     "invariant": "^2.2.4",
     "katex": "^0.12.0",
     "lodash": "^4.17.20",