Add .browserslistrc config file

Author: colinrotherham

.browserslistrc

@@ -0,0 +1,11 @@
+# This list builds on the GOV.UK service manual's browser testing recommendations
+# https://www.gov.uk/service-manual/technology/designing-for-different-browsers-and-devices
+
+> 0.1%
+last 2 Chrome versions
+last 2 Firefox versions
+last 2 Edge versions
+last 2 Samsung versions
+Safari >= 9
+ie 8-11
+iOS >= 9

package.json

@@ -87,16 +87,6 @@
     "webpack-cli": "^3.3.12",
     "webpack-dev-server": "^3.11.3"
   },
-  "browserslist": [
-    ">0.1%",
-    "last 2 Chrome versions",
-    "last 2 Firefox versions",
-    "last 2 Edge versions",
-    "last 2 Samsung versions",
-    "Safari >= 9",
-    "ie 8-11",
-    "iOS >= 9"
-  ],
   "standard": {
     "parser": "babel-eslint"
   }