fix: restart flow server explicitly to avoid false errors from a lingering server

Author: mvines

package.json

@@ -35,8 +35,9 @@
     "test:watch": "cross-env NODE_ENV=test jest --watch --useStderr",
     "test:cover": "cross-env NODE_ENV=test jest --coverage --useStderr",
     "codecov": "npm run test:cover && cat ./coverage/lcov.info | codecov",
-    "flow": "flow-typed install jest@22 && flow",
-    "flow:watch": "watch 'flow' . --wait=1 --ignoreDirectoryPattern=/doc/",
+    "flow": "flow stop; flow-typed install jest@22 && flow",
+    "flow:watch": "flow stop; watch 'flow' . --wait=1 --ignoreDirectoryPattern=/doc/",
+    "flow:stop": "flow stop",
     "lint": "eslint .",
     "lint:fix": "npm run lint -- --fix",
     "lint:watch": "watch 'npm run lint:fix' . --wait=1 --ignoreDirectoryPattern=/doc/",