Also include typing checks in lint:check

package.json

@@ -51,7 +51,7 @@
     "test:firefox": "lerna run test:firefox --scope \"@jupyterlab/test-*\" --concurrency 1 --stream",
     "test:ie": "lerna run test:ie --scope \"@jupyterlab/test-*\" --concurrency 1 --stream",
     "tslint": "tslint --fix -c tslint.json --project tsconfigbase.json '**/*{.ts,.tsx}'",
-    "tslint:check": "tslint -c tslint.json '**/*{.ts,.tsx}'",
+    "tslint:check": "tslint -c tslint.json --project tsconfigbase.json '**/*{.ts,.tsx}'",
     "prettier": "prettier --write '**/*{.ts,.tsx,.js,.jsx,.css,.json,.md}'",
     "prettier:check": "prettier --list-different '**/*{.ts,.tsx,.js,.jsx,.css,.json,.md}'",
     "update:dependency": "node buildutils/lib/update-dependency.js --lerna",