Integration tests may depend on third parties and can fail from time to
time. In some situations failing tests can be acceptable to go forward
with deployments. They should not be a requirement that blocks
deployments. They may lead to unintended lack of distributed packages as
seen in #90.
Integration tests are executed using vue-cli-service with double quotes as following: `vue-cli-service test:unit "tests/integration/**/*.spec.ts"`. Using single quotes (mochajs/mocha#1828) works on macOS and Ubuntu but does not on Windows (tests are not found). Double quotes is the only portable way that works on all three platforms (mochajs/mocha#3136).
