build: use latest yarn

Author: MarshallOfSound

.circleci/config.yml

@@ -9,14 +9,14 @@ jobs:
           keys:
             - v1-dependencies-{{ checksum "yarn.lock" }}
             - v1-dependencies-
-      - run: yarn install
+      - run: npx yarn install
       - save_cache:
           paths:
             - node_modules
           key: v1-dependencies-{{ checksum "yarn.lock" }}
-      - run: yarn prettier:check
-      - run: yarn build
-      - run: yarn test
+      - run: npx yarn prettier:check
+      - run: npx yarn build
+      - run: npx yarn test
   release:
     docker:
       - image: circleci/node:10.15
@@ -26,8 +26,8 @@ jobs:
           keys:
             - v1-dependencies-{{ checksum "yarn.lock" }}
             - v1-dependencies-
-      - run: yarn install
-      - run: yarn build
+      - run: npx yarn install
+      - run: npx yarn build
       - run: npx semantic-release
 workflows:
   version: 2