Add CI pipeline for releasing (#18)

## What is the goal of this PR?

Allows to deploy `client-nodejs` to `npm` after approval

## What are the changes implemented in this PR?

- add a reference to `@graknlabs_grabl` so `release-approval` is available as `bazel` target
- `test-repo-deploy` now depends on tests successfully passing
- added `release-approval`/`deploy-npm`/`release-cleanup` jobs

.circleci/config.yml

@@ -63,6 +63,28 @@ jobs:
       - run: sudo apt install -y expect
       - run: bazel run //:deploy-npm -- test $TEST_REPO_USERNAME $TEST_REPO_PASSWORD $TEST_REPO_EMAIL
 
+  release-approval:
+    machine: true
+    steps:
+      - checkout
+      - bazel_install
+      - run: bazel run @graknlabs_grabl//ci:release-approval
+
+  deploy-npm:
+    machine: true
+    working_directory: ~/grakn
+    steps:
+      - checkout
+      - bazel_install
+      - bazel_add_rbe_credential
+      - run: bazel run //:deploy-npm -- npmjs $NPM_REPO_USERNAME $NPM_REPO_PASSWORD $NPM_REPO_EMAIL
+
+  release-cleanup:
+    machine: true
+    steps:
+      - checkout
+      - run: git push --delete origin grakn-client-nodejs-release-branch
+
 workflows:
   version: 2
   grakn-client-nodejs-ci:
@@ -72,3 +94,28 @@ workflows:
           filters:
             branches:
               only: master
+          requires:
+            - client-nodejs
+      - release-approval:
+          filters:
+            branches:
+              only: master
+          requires:
+            - client-nodejs
+
+  # the 'grakn-client-nodejs-release' workflow is triggered by the creation of 'grakn-client-nodejs-release-branch' branch in graknlabs/client-nodejs
+  # it consists of jobs which:
+  # - publishes client-nodejs to npm
+  # - cleans up the 'grakn-client-nodejs-release-branch' branch which was created by the release-approval job
+  grakn-client-nodejs-release:
+    jobs:
+      - deploy-npm:
+          filters:
+            branches:
+              only: grakn-client-nodejs-release-branch
+      - release-cleanup:
+          requires:
+            - deploy-npm
+          filters:
+            branches:
+              only: grakn-client-nodejs-release-branch

WORKSPACE

@@ -44,7 +44,11 @@ git_repository(
     commit="6298bcf46c0ae8b1b5c9bd5138e10be38a3a9bc3"
 )
 
-
+git_repository(
+    name = "graknlabs_grabl",
+    remote = "https://github.com/graknlabs/grabl",
+    commit="ad79f87f869d25694fe11196e16be42a80e95d14"
+)
 
 # ----- @graknlabs_grakn deps -----
 git_repository(