chore(ci): switch again to CircleCI

Author: Arthur Agombart

.circleci/commit-lockfile.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+PROJECT_LOCKFILE=${PROJECT_LOCKFILE:-"package-lock.json"}
+GITHUB_EMAIL=${GITHUB_EMAIL:-"task-runner@circleci"}
+GITHUB_NAME=${GITHUB_NAME:-"Circle CI<$GITHUB_EMAIL>"}
+
+if [[ $CIRCLE_BRANCH != *"greenkeeper"* ]]; then
+  exit 0
+fi
+
+if ! git diff-index --quiet HEAD $PROJECT_LOCKFILE --; then
+  git config user.email $GITHUB_EMAIL
+  git config user.name $GITHUB_NAME
+
+  git add $PROJECT_LOCKFILE
+  git commit -m "chore(*): update lockfile [ci skip]" -m "See: $CIRCLE_BUILD_URL"
+  git push origin $CIRCLE_BRANCH
+fi

.circleci/config.yml

@@ -0,0 +1,37 @@
+# Javascript Node CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-javascript/ for more details
+#
+version: 2
+jobs:
+  build:
+    docker:
+      # https://circleci.com/docs/2.0/circleci-images/
+      - image: circleci/node:9-browsers
+
+    steps:
+      - checkout
+
+      - restore_cache:
+          keys:
+          - dependencies-{{ checksum "package.json" }}
+          - dependencies-
+
+      - run:
+          name: Install dependencies
+          command: npm i
+
+      - save_cache:
+          paths:
+            - node_modules
+          key: dependencies-{{ checksum "package.json" }}
+
+      - run: 
+          name: Executing tests
+          command: npm test
+
+      - run:
+          name: Update Lockfile
+          command: .circleci/commit-lockfile.sh
+
+