add babel-plugin-rewire to karma build

.babelrc

@@ -14,7 +14,8 @@
           {
             "process.env.BABEL_ENV": "coverage"
           }
-        ]
+        ],
+        "rewire"
       ]
     }
   }

package.json

@@ -98,6 +98,9 @@
     "axios-mock-adapter": "^1.10.0",
     "babel-eslint": "^8.0.2",
     "babel-plugin-istanbul": "^4.1.5",
+    "babel-plugin-rewire": "^1.1.0",
+    "babel-template": "^6.26.0",
+    "babel-types": "^6.26.0",
     "commander": "^2.15.1",
     "eslint": "^3.18.0",
     "eslint-config-airbnb-base": "^10.0.1",

yarn.lock

@@ -670,6 +670,10 @@ babel-plugin-istanbul@^4.1.5:
     istanbul-lib-instrument "^1.7.5"
     test-exclude "^4.1.1"
 
+babel-plugin-rewire@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/babel-plugin-rewire/-/babel-plugin-rewire-1.1.0.tgz#a6b966d9d8c06c03d95dcda2eec4e2521519549b"
+
 babel-plugin-syntax-async-functions@^6.8.0:
   version "6.13.0"
   resolved "https://registry.yarnpkg.com/babel-plugin-syntax-async-functions/-/babel-plugin-syntax-async-functions-6.13.0.tgz#cad9cad1191b5ad634bf30ae0872391e0647be95"