Update @callstack/eslint-config to the latest version 🚀 (#206)

Author: greenkeeper[bot]

package.json

@@ -17,7 +17,7 @@
   "devDependencies": {
     "@babel/cli": "^7.1.2",
     "@babel/core": "^7.1.2",
-    "@callstack/eslint-config": "^6.0.0",
+    "@callstack/eslint-config": "^7.0.0",
     "@release-it/conventional-changelog": "^1.1.0",
     "@types/react": "^16.7.11",
     "@types/react-test-renderer": "^16.0.3",