Upgrade to Gatsby v2

src/components/Post/Author/Author.module.scss

@@ -0,0 +1,26 @@
+@import '../../../assets/scss/variables';
+@import '../../../assets/scss/mixins';
+
+.author {
+  border-top: 1px solid $color-gray-border;
+  max-width: $layout-post-width;
+  padding-top: 20px;
+  @include line-height(1);
+  @include margin-top(1);
+  @include margin-bottom(2);
+
+  &__bio {
+    &-twitter {
+      display: block;
+      text-decoration: underline;
+    }
+  }
+}
+
+@include breakpoint-sm {
+  .author {
+    margin-left: auto;
+    margin-right: auto;
+  }
+
+}