add reducer file commit hook warning

package.json

@@ -185,6 +185,7 @@
     "redux-saga-test-plan": "3.7.0",
     "release-it": "8.2.0",
     "rimraf": "2.6.3",
+    "staged-git-files": "1.1.2",
     "standard": "12.0.1",
     "style-loader": "0.23.1",
     "thread-loader": "2.1.1",

scripts/commitHook.js

@@ -0,0 +1,20 @@
+/* eslint-disable */
+const chalk = require('chalk')
+const sgf = require('staged-git-files')
+
+// checks current files in commit for reducer files.  Warning user if any are found
+sgf((error, files) => {
+  if (error) return
+  if (
+    files
+      .map(file => file.filename)
+      .filter(filename => filename.includes('reducer')).length
+  ) {
+    console.log(
+      chalk.red.bold('.: Warning :.\n') +
+        chalk.yellow(
+          "You've modified a reducer file. Please verify the Redux state import/export feature still works before creating PR."
+        )
+    )
+  }
+})