add CI tests

.gitlab-ci.yml

@@ -0,0 +1,29 @@
+stages:
+  - test
+  - deploy
+
+image: node:14
+
+before_script:
+  - echo "//registry.npmjs.org/:_authToken=${NPM_REGISTRY_TOKEN}" > .npmrc
+  - npm ci --cache .npm --prefer-offline
+
+cache:
+  key: "nedb" # universal cache
+  paths:
+    - .npm/
+
+test:
+  stage: test
+  script:
+    - npm run lint
+    - npm run test
+    - npm run test:browser
+
+deploy:
+  stage: deploy
+  script:
+    - if (npx semver $CI_COMMIT_TAG --range '>0.0.0'); then NPM_TAG=latest; else NPM_TAG=beta; fi; # Using the fact that semver by default considers that pre-releases do not respect stable ranges
+    - npm publish --tag=$NPM_TAG
+  only:
+    - tags