Update gatsby monorepo (#117)

Author: renovate[bot]

examples/markdown-docs/package-lock.json

@@ -1,7 +1,7 @@
 {
   "name": "markdown-docs-example",
   "dependencies": {
-    "gatsby": "2.17.17",
+    "gatsby": "2.18.3",
     "gatsby-source-airtable": "2.0.10",
     "gatsby-source-filesystem": "2.1.38",
     "gatsby-transformer-remark": "2.6.37",

examples/markdown-docs/package.json

@@ -5,11 +5,11 @@
   "repository": "[email protected]:jbolda/gatsby-source-airtable.git",
   "author": "Jacob Bolda <[email protected]>",
   "dependencies": {
-    "gatsby": "2.17.17",
+    "gatsby": "2.18.3",
     "gatsby-image": "2.2.33",
     "gatsby-link": "2.2.24",
     "gatsby-plugin-react-helmet": "3.1.15",
-    "gatsby-plugin-sharp": "2.3.2",
+    "gatsby-plugin-sharp": "2.3.3",
     "gatsby-source-airtable": "2.0.10",
     "gatsby-source-filesystem": "2.1.38",
     "gatsby-transformer-sharp": "2.3.5",

examples/markdown-docs/yarn.lock

@@ -1,7 +1,7 @@
 {
   "name": "testing-options",
   "dependencies": {
-    "gatsby": "2.17.17",
+    "gatsby": "2.18.3",
     "gatsby-source-airtable": "2.0.10",
     "gatsby-source-filesystem": "2.1.38",
     "gatsby-transformer-remark": "2.6.37",