Lint: Run lint unit tests on Python 3 as well.

.circleci/config.yml

@@ -62,6 +62,18 @@ jobs:
       # - run:
       #     name: "Run deploy"
       #     command: ./tools/scripts/deploy.sh
+  "Project lint unit tests on Python 3":
+    docker:
+      - image: circleci/python:3.7.4
+    working_directory: ~/test262
+    steps:
+      - checkout
+      - run:
+          name: "Install requirements for linter tool"
+          command: python -m pip install --user --requirement tools/lint/requirements.txt
+      - run:
+          name: "Test the lint tool"
+          command: ./tools/lint/test/run.py
   "V8: New or modified tests execution":
     docker:
       - image: *node_latest
@@ -125,6 +137,7 @@ workflows:
   Tools:
     jobs:
       - "Project lint, generation tests and build"
+      - "Project lint unit tests on Python 3"
   Tests execution:
     jobs:
       - "ChakraCore: New or modified tests execution"