Bump actions/checkout from 2 to 3

.github/workflows/lint.yml

@@ -6,7 +6,7 @@ jobs:
     name: Lint Solidity
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v1
         with:
           node-version: '14.x'
@@ -20,7 +20,7 @@ jobs:
     name: Lint JS
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-node@v1
         with:
           node-version: '14.x'

.github/workflows/release.yml

@@ -11,7 +11,7 @@ jobs:
     if: github.event_name == 'push' && github.ref == 'refs/heads/master'
     steps:
 
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: google-github-actions/release-please-action@v3
         id: release
         with:

.github/workflows/test.yml

@@ -13,7 +13,7 @@ jobs:
         node-version: [14.x]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
       - uses: actions/[email protected]
         with:
           path: ~/.npm
@@ -47,7 +47,7 @@ jobs:
         node-version: [14.x]
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v3
       - name: Install Node.js ${{ matrix.node-version }}
         uses: actions/[email protected]
         with: