Added consistent linting pattern to all packages

refs: https://github.com/TryGhost/Toolbox/issues/188

- some of our older packages used a pattern for linting which missed using test config for linting tests
- we need this to be consistent so that we can add more eslint rules for testing
- two packages also didn't use the lib pattern, which made the lint pattern error - so this was fixed as well

Author: ErisDS

packages/members-csv/package.json

@@ -9,7 +9,9 @@
     "dev": "echo \"Implement me!\"",
     "test:unit": "NODE_ENV=testing c8 --all --reporter text --reporter cobertura mocha './test/**/*.test.js'",
     "test": "yarn test:unit",
-    "lint": "eslint . --ext .js --cache"
+    "lint:code": "eslint *.js lib/ --ext .js --cache",
+    "lint": "yarn lint:code && yarn lint:test",
+    "lint:test": "eslint -c test/.eslintrc.js test/ --ext .js --cache"
   },
   "files": [
     "index.js",