fix ci conditional

build/ci.sh

@@ -1,5 +1,5 @@
 set -e
-if [ -z "$CI_PULL_REQUEST" ] || [ "$CIRCLE_BRANCH" == "master" ]; then
+if [[ -z $CI_PULL_REQUEST ]] && [[ $CIRCLE_BRANCH = master ]]; then
   npm run lint
   npm run cover
   cat ./coverage/lcov.info | ./node_modules/.bin/codecov