fix: update dependency react-codemirror2 to v5 (#176)

Author: renovate[bot]

website/package.json

@@ -24,7 +24,7 @@
     "next": "5.1.0",
     "prettier-browser": "git://github.com/prettier/prettier.git#1.8.2",
     "react": "16.3.2",
-    "react-codemirror2": "4.3.0",
+    "react-codemirror2": "5.0.0",
     "react-dom": "16.3.2",
     "react-syntax-highlighter": "7.0.2",
     "scroll-into-view-if-needed": "2.0.0-dev",

yarn.lock

@@ -6841,9 +6841,9 @@ rc@^1.0.1, rc@^1.1.6, rc@^1.1.7:
     minimist "^1.2.0"
     strip-json-comments "~2.0.1"
 
-react-codemirror2@4.3.0:
-  version "4.3.0"
-  resolved "https://registry.yarnpkg.com/react-codemirror2/-/react-codemirror2-4.3.0.tgz#e79aedca4da60d22402d2cd74f2885a3e5c009fd"
+react-codemirror2@5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/react-codemirror2/-/react-codemirror2-5.0.0.tgz#18e0d4495c3cfe0c4675dd9bfcea074ca3aa9f56"
 
 [email protected]:
   version "16.3.2"