fix(deps): update dependency eslint-watch to v8

Author: renovate[bot]

package.json

@@ -54,7 +54,7 @@
     "copy": "^0.3.1",
     "eslint": "^3.18.0",
     "eslint-plugin-flowtype": "^2.41.0",
-    "eslint-watch": "^3.0.1",
+    "eslint-watch": "^8.0.0",
     "flow-bin": "^0.183.0",
     "flow-watch": "^1.1.1",
     "husky": "^0.14.3",