feat: allow custom locale store cookie domain (#33)

* test: use mocha@4

appveyor.yml

@@ -2,7 +2,9 @@ environment:
   matrix:
     - nodejs_version: '4'
     - nodejs_version: '6'
-    - nodejs_version: '7'
+    - nodejs_version: '8'
+    - nodejs_version: '10'
+    - nodejs_version: '11'
 
 install:
   - ps: Install-Product node $env:nodejs_version
@@ -11,6 +13,6 @@ install:
 test_script:
   - node --version
   - npm --version
-  - npm run ci
+  - npm run test
 
 build: off