ci: migrate circle CI to travis CI

.travis.yml

@@ -0,0 +1,16 @@
+language: node_js
+node_js:
+  - '11.12.0'
+
+sudo: false
+
+before_install:
+  - npm install -g ganache-cli
+  - npm run bootstrap
+  - rm packages/vvisp/package-lock.json
+  - rm packages/vvisp-utils/package-lock.json
+
+before_deploy:
+  - cd $TRAVIS_BUILD_DIR
+
+script: 'true'

package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
   "scripts": {
-    "lerna:bootstrap": "lerna bootstrap --hoist --no-ci",
+    "lerna:bootstrap": "lerna bootstrap --no-ci",
     "bootstrap": "npm install && npm run lerna:bootstrap",
     "test": "./scripts/test.sh",
     "ci": "./scripts/ci.sh",