Upgrade flow and tweak warnings (#58)

Author: TrySound

package.json

@@ -17,7 +17,7 @@
     "build:all": "npm run build:commonjs && npm run build:es && npm run build:umd && npm run build:umd:min && npm run build:flow",
     "build": "npm run clean && npm run build:all",
     "clean": "rimraf lib dist es",
-    "typecheck:flow": "flow check && [[ $(flow check) == 'Found 0 errors' ]]",
+    "typecheck:flow": "flow check --max-warnings=0",
     "lint": "eslint src",
     "test:only": "jest",
     "test:bundle": "jest --setupTestFrameworkScriptFile ./tests/jestBundleSetup.js",
@@ -80,7 +80,7 @@
     "eslint": "^4.6.1",
     "eslint-plugin-import": "^2.7.0",
     "eslint-plugin-react": "^7.3.0",
-    "flow-bin": "^0.63.1",
+    "flow-bin": "^0.66.0",
     "husky": "^0.14.3",
     "jest": "^22.1.1",
     "lint-staged": "^6.0.0",

yarn.lock

@@ -1816,9 +1816,9 @@ flat-cache@^1.2.1:
     graceful-fs "^4.1.2"
     write "^0.2.1"
 
-flow-bin@^0.63.1:
-  version "0.63.1"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.63.1.tgz#ab00067c197169a5fb5b4996c8f6927b06694828"
+flow-bin@^0.66.0:
+  version "0.66.0"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.66.0.tgz#a96dde7015dc3343fd552a7b4963c02be705ca26"
 
 for-each@~0.3.2:
   version "0.3.2"