ci: setup circleci and remove coveralls

.circleci/config.yml

@@ -0,0 +1,40 @@
+version: 2
+jobs:
+  build_10.15.3:
+    docker:
+      - image: 'circleci/node:10.15.3'
+    working_directory: ~/app
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - 'v1-dependencies-{{ checksum "package.json" }}'
+            - v1-dependencies-
+      - run: npm install
+      - save_cache:
+          paths:
+            - node_modules
+          key: 'v1-dependencies-{{ checksum "package.json" }}'
+      - run: npm test
+  build_latest:
+    docker:
+      - image: 'circleci/node:latest'
+    working_directory: ~/app
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - 'v1-dependencies-{{ checksum "package.json" }}'
+            - v1-dependencies-
+      - run: npm install
+      - save_cache:
+          paths:
+            - node_modules
+          key: 'v1-dependencies-{{ checksum "package.json" }}'
+      - run: npm test
+workflows:
+  version: 2
+  workflow:
+    jobs:
+      - build_10.15.3
+      - build_latest

config.json

@@ -3,7 +3,7 @@
   "ts": true,
   "license": "MIT",
   "services": [
-    "coveralls"
+    "circleci"
   ],
   "minNodeVersion": "10.15.3"
 }