test: run jest in band on circle ci (conventional-changelog#905)

This prevents ts-jest to flood the memory, making it horrible slow and often failing without memory

Author: byCedric

.circleci/config.yml

@@ -35,7 +35,7 @@ commands:
     steps:
       - run:
           name: Test
-          command: yarn test
+          command: yarn test-ci
   save-cache:
     steps:
       - save_cache:

package.json

@@ -16,7 +16,8 @@
     "publish": "lerna publish --conventional-commits",
     "reinstall": "yarn clean && yarn install",
     "start": "lerna run start --stream --parallel --include-filtered-dependencies",
-    "test": "jest && lerna run test --stream --parallel --include-filtered-dependencies"
+    "test": "jest && lerna run test --stream --parallel --include-filtered-dependencies",
+    "test-ci": "jest --runInBand && lerna run test --stream --parallel --include-filtered-dependencies"
   },
   "commitlint": {
     "extends": [