switch to gl-js specific image

.circleci/config.yml

@@ -3,16 +3,15 @@ version: 2
 jobs:
   build:
     docker:
-      - image: mbgl/ci:r4-linux-clang-3.9
+      - image: mbgl/ci:r1-linux-gl-js
     working_directory: ~/mapbox-gl-js
     steps:
       - checkout
       - restore_cache:
           key: v1-mapbox-gl-js-cache
       - run:
           name: install dependencies
-          command: |
-            bash ./.circleci/dependencies.sh
+          command: yarn
       - save_cache:
           key: v1-mapbox-gl-js-cache
           paths:

.circleci/test.sh

@@ -13,16 +13,16 @@ PATH=$(python -m site --user-base)/bin:${PATH}
 rm -rf coverage .nyc_output
 
 # run linters
-npm run lint
-npm run lint-docs
-npm run lint-css
+yarn run lint
+yarn run lint-docs
+yarn run lint-css
 
 # build and run build tests
-npm run build-min
-npm run build-dev
+yarn run build-min
+yarn run build-dev
 
 # run flow to check types
-npm run test-flow
+yarn run test-flow
 
 # run unit, render & query tests with coverage
 xvfb-run --server-args="-screen 0 1024x768x24" npm run test-cov
@@ -36,6 +36,6 @@ fi
 
 # upload benchmarks
 if [ "$CIRCLE_BRANCH" == "master" ]; then
-    npm run build-benchmarks
+    yarn run build-benchmarks
     aws s3 cp --acl public-read --content-type application/javascript bench/benchmarks_generated.js s3://mapbox-gl-js/master/benchmarks.js
 fi