diff --git a/.editorconfig b/.editorconfig
index eae0ed5..56f62d0 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -8,7 +8,7 @@ charset = utf-8
 insert_final_newline = true
 trim_trailing_whitespace = true
 
-[*.{md,yml}]
+[*.{md,yml,yaml}]
 indent_style = space
 
 [*.md]
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index cfc88c5..6dbb668 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,30 +6,35 @@ jobs:
   build:
     strategy:
       matrix:
-        node: [ '8', '10' ]
-        os: ['ubuntu-latest', 'windows-latest', 'macOS-latest']
+        node:
+          - '8'
+          - '10'
+        os:
+          - 'ubuntu-latest'
+          - 'windows-latest'
+          - 'macOS-latest'
 
-    name: Node.js v{{ matrix.node }}.x on {{ matrix.os }}
-    runs-on: {{ matrix.os }}
+    name: Node.js v${{ matrix.node }}.x on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@master
-
-    - name: Use Node.js {{ matrix.os }}.x
-      uses: actions/setup-node@v1
-      with:
-        version: {{ matrix.node }}.x
-
-    - name: install and lint
-      run: |
-        npm install
-        npx xo
-
-    - name: test lib
-      run: npx nyc --reporter=lcov ava test/lib.spec.js
-
-    - name: test api
-      run: npx ava test/api.spec.js
-      
-    - name: test cli
-      run: npx ava test/cli.spec.js
+      - uses: actions/checkout@master
+
+      - name: Use Node.js ${{ matrix.os }}.x
+        uses: actions/setup-node@v1
+        with:
+          version: ${{ matrix.node }}.x
+
+      - name: install and lint
+        run: |
+          npm install
+          npx xo
+
+      - name: test lib
+        run: npx nyc --reporter=lcov ava test/lib.spec.js
+
+      - name: test api
+        run: npx ava test/api.spec.js
+
+      - name: test cli
+        run: npx ava test/cli.spec.js