Update dependency codemirror to v5.42.0

Author: renovate-bot

package.json

@@ -50,7 +50,7 @@
     "babel-polyfill": "6.26.0",
     "babel-preset-es2015": "6.24.1",
     "babel-preset-react": "6.24.1",
-    "codemirror": "5.41.0",
+    "codemirror": "5.42.0",
     "css-loader": "1.0.1",
     "eslint": "5.9.0",
     "eslint-plugin-react": "7.5.1",

yarn.lock

@@ -1728,9 +1728,9 @@ code-point-at@^1.0.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/code-point-at/-/code-point-at-1.1.0.tgz#0d070b4d043a5bea33a2f1a40e2edb3d9a4ccf77"
 
-codemirror@5.41.0:
-  version "5.41.0"
-  resolved "https://registry.yarnpkg.com/codemirror/-/codemirror-5.41.0.tgz#57e245be197643c39440d2840236d3edc4bb1162"
+codemirror@5.42.0:
+  version "5.42.0"
+  resolved "https://registry.yarnpkg.com/codemirror/-/codemirror-5.42.0.tgz#2d5b640ed009e89dee9ed8a2a778e2a25b65f9eb"
 
 collection-visit@^1.0.0:
   version "1.0.0"