update ci config

.travis.yml

@@ -1,10 +1,12 @@
 language: node_js
 node_js:
-  - "8"
-cache: yarn
+  - 8
+cache:
+  yarn: true
 before_install:
   yarn add codecov
 script:
-  npm test -- --coverage
+  - npm run flow
+  - npm test -- --coverage
 after_success:
   codecov

appveyor.yml

@@ -1,20 +1,19 @@
-# Test against the latest version of this Node.js version
+version: "{build}"
+
 environment:
   nodejs_version: "6"
 
-# Install scripts. (runs after repo cloning)
 install:
-  # Get the latest stable version of Node.js or io.js
   - ps: Install-Product node $env:nodejs_version
-  # install modules
-  - npm install
+  - yarn
+
+cache:
+  - '%LOCALAPPDATA%/Yarn'
 
-# Post-install test scripts.
 test_script:
-  # Output useful info for debugging.
   - node --version
   - npm --version
-  # run tests
+  - npm run flow
   - npm test
 
 # Don't actually build.

package.json

@@ -16,7 +16,8 @@
     "gh-pages": "rimraf _gh-pages && gh-pages:build && gh-pages:publish",
     "gh-pages:build": "cross-env NODE_ENV=production webpack --config webpack.config.prod.js",
     "gh-pages:publish": "git-directory-deploy --directory _gh-pages --branch gh-pages",
-    "prepublish": "npm run build"
+    "prepublish": "npm run build",
+    "validate": "npm ls"
   },
   "repository": {
     "type": "git",
@@ -139,4 +140,4 @@
     "lint",
     "test"
   ]
-}
+}