Correct npm package names

.github/workflows/lint-frontend.yaml

@@ -22,15 +22,12 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install modules
-        run: npm install dev-tools
-
-      - name: Yarn install
-        run: yarn
+        run: npm install stylelint eslint
 
       # See .stylelintignore for files that are not linted.
       - name: Run stylelint
         run: >
-          yarn stylelint bookwyrm/static/css/*.css \
+           npx stylelint bookwyrm/static/css/*.css \
             --config dev-tools/.stylelintrc.js
 
       # See .eslintignore for files that are not linted.

.github/workflows/prettier.yaml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install modules
-        run: npm install dev-tools
+        run: npm install prettier
 
       - name: Run Prettier
         run: npx prettier --check bookwyrm/static/js/*.js