set resource_class to large, back to yarn

.circleci/config.yml

@@ -19,6 +19,7 @@ jobs:
     docker:
       - image: mbgl/ci:r4-linux-gl-js
     working_directory: ~/mapbox-gl-js
+    resource_class: large
     steps:
       - checkout
       - restore_cache:

.circleci/test.sh

@@ -13,19 +13,19 @@ 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
+xvfb-run --server-args="-screen 0 1024x768x24" yarn run test-cov
 
 # send coverage report to coveralls
 nyc report --reporter=lcov
@@ -37,6 +37,6 @@ 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