[chore] Upgrade eslint, flow and prettier packages

.eslintrc

@@ -23,7 +23,7 @@
         ]
       }
     ],
-    "prettier/prettier": "warn", // set to error to enable project wide prettier
+    "prettier/prettier": "error",
     "import/no-extraneous-dependencies": "off",
     "flowtype/define-flow-type": 1,
     "flowtype/use-flow-type": 1,

package.json

@@ -15,6 +15,7 @@
     "deploy-movies": "yarn run build && cd packages/movies-studio && sanity deploy",
     "storybook": "gulp storybook",
     "lint": "eslint . --quiet",
+    "lint:fix": "eslint . --quiet --fix",
     "typecheck": "lerna run typecheck",
     "start": "npm run test-studio",
     "test-studio": "gulp test-studio",
@@ -56,16 +57,16 @@
     "babel-register": "^6.26.0",
     "boxen": "^1.3.0",
     "chalk": "^2.3.0",
-    "eslint": "^4.16.0",
+    "eslint": "^4.19.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-import-resolver-webpack": "^0.8.4",
-    "eslint-plugin-flowtype": "^2.42.0",
-    "eslint-plugin-flowtype-errors": "^3.3.7",
-    "eslint-plugin-import": "^2.8.0",
-    "eslint-plugin-prettier": "^2.5.0",
-    "eslint-plugin-react": "yannickcr/eslint-plugin-react",
+    "eslint-plugin-flowtype": "^2.46.1",
+    "eslint-plugin-flowtype-errors": "^3.5.1",
+    "eslint-plugin-import": "^2.9.0",
+    "eslint-plugin-prettier": "^2.6.0",
+    "eslint-plugin-react": "^7.7.0",
     "execa": "^0.9.0",
-    "flow-bin": "^0.64.0",
+    "flow-bin": "^0.68.0",
     "glob": "^7.1.2",
     "gulp": "^3.9.1",
     "gulp-babel": "^7.0.1",

packages/@sanity/validation/package.json

@@ -30,11 +30,7 @@
   },
   "devDependencies": {
     "babel-preset-env": "^1.6.1",
-    "eslint": "^4.13.1",
-    "eslint-config-prettier": "^2.9.0",
-    "eslint-config-sanity": "^3.1.0",
-    "jest": "^22.1.4",
-    "prettier": "^1.9.2"
+    "jest": "^22.1.4"
   },
   "dependencies": {
     "clone-deep": "^2.0.1",