Watch tests

Author: CodingItWrong

package.json

@@ -7,7 +7,7 @@
   "author": "Josh Justice <me@codingitwrong.com>",
   "license": "Apache-2.0",
   "scripts": {
-    "test": "jest",
+    "test": "jest --watchAll",
     "lint": "eslint \"{src,test}/*.js\"",
     "format": "prettier --write \"{src,test}/*.js\"",
     "docs:dev": "vuepress dev docs",