added travis

Author: Dipak Sarkar

.travis.yml

@@ -0,0 +1,14 @@
+language: node_js
+node_js:
+  - "16"
+install:
+  - yarn install
+  - yarn global add codecov
+jobs:
+  include:
+    - stage: Unit Tests
+      script: yarn test --coverage && codecov
+    - stage: Lint
+      script: yarn lint
+    - stage: Publish npm package
+      script: yarn build