[actions] add reusable workflows

 - remove ubuntu tests from existing workflow, since they're covered by the new ones.

.github/workflows/node-aught.yml

@@ -0,0 +1,21 @@
+name: 'Tests: node.js < 10'
+
+on: [pull_request, push]
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    uses: ljharb/actions/.github/workflows/node.yml@main
+    with:
+      range: '< 10'
+      type: minors
+      command: npm run tests-only
+
+  node:
+    name: 'node < 10'
+    needs: [tests]
+    runs-on: ubuntu-latest
+    steps:
+      - run: 'echo tests completed'

.github/workflows/node-pretest.yml

@@ -0,0 +1,10 @@
+name: 'Tests: pretest/posttest'
+
+on: [pull_request, push]
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    uses: ljharb/actions/.github/workflows/pretest.yml@main

.github/workflows/node-tens.yml

@@ -0,0 +1,21 @@
+name: 'Tests: node.js >= 10'
+
+on: [pull_request, push]
+
+permissions:
+  contents: read
+
+jobs:
+  tests:
+    uses: ljharb/actions/.github/workflows/node.yml@main
+    with:
+      range: '>= 10'
+      type: minors
+      command: npm run tests-only
+
+  node:
+    name: 'node >= 10'
+    needs: [tests]
+    runs-on: ubuntu-latest
+    steps:
+      - run: 'echo tests completed'

.github/workflows/nodejs.yml

@@ -3,33 +3,106 @@ name: Node CI
 on: [push, pull_request]
 
 jobs:
-  test:
+  matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      latest: ${{ steps.set-matrix.outputs.requireds }}
+      nonlatest: ${{ steps.set-matrix.outputs.optionals }}
+    steps:
+      - uses: ljharb/actions/node/matrix@main
+        id: set-matrix
+        with:
+          versionsAsRoot: true
+          type: majors
+          preset: ">= 0.8"
+
+  latest:
+    needs: [matrix]
+    name: 'latest majors'
     strategy:
+      fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        node-version: ['0.8', '0.10', '0.12', '4.x', '6.x', '8.x', '10.x', '12.x']
+        os: [windows-latest, macos-latest]
+        node-version: ${{ fromJson(needs.matrix.outputs.latest) }}
         exclude:
+          - os: windows-latest
+            node-version: '3'
+          - os: windows-latest
+            node-version: '2'
+          - os: windows-latest
+            node-version: '1'
           - os: windows-latest
             node-version: '0.8'
 
     runs-on: ${{matrix.os}}
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
+
+    - uses: ljharb/actions/node/install@main
+      name: 'nvm install ${{ matrix.node-version }} && npm install'
+      with:
+        node-version: ${{ matrix.node-version }}
+        skip-ls-check: true
+      if: matrix.os != 'windows-latest'
+
     - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v1
+      uses: actions/setup-node@v3
       with:
         node-version: ${{ matrix.node-version }}
-    - name: Disable strict SSL checks
-      uses: allenevans/set-env@v1.0.0
+      if: matrix.os == 'windows-latest'
+
+    - run: npm install
+      env:
+        NPM_CONFIG_STRICT_SSL: false
+      if: matrix.os == 'windows-latest'
+
+    - run: npm run tests-only
+    - uses: codecov/codecov-action@v3
+
+  nonlatest:
+    needs: [matrix, latest]
+    name: 'non-latest majors'
+    continue-on-error: true
+    if: ${{ needs.matrix.outputs.nonlatest != '[]' && (!github.head_ref || !startsWith(github.head_ref, 'renovate')) }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [windows-latest, macos-latest]
+        node-version: ${{ fromJson(needs.matrix.outputs.nonlatest) }}
+        exclude:
+          - os: windows-latest
+            node-version: '0.8'
+
+    runs-on: ${{matrix.os}}
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - uses: ljharb/actions/node/install@main
+      name: 'nvm install ${{ matrix.node-version }} && npm install'
       with:
-        NPM_CONFIG_STRICT_SSL: 'false'
-      if: matrix.node-version == '0.8'
-    - name: Upgrade npm to latest available version
-      run: |
-        curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.1/install.sh | bash
-        source $HOME/.nvm/nvm.sh
-        nvm install-latest-npm
+        node-version: ${{ matrix.node-version }}
+        skip-ls-check: true
       if: matrix.os != 'windows-latest'
+
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+      if: matrix.os == 'windows-latest'
+
     - run: npm install
-    - run: npm test
+      env:
+        NPM_CONFIG_STRICT_SSL: false
+      if: matrix.os == 'windows-latest'
+
+    - run: npm run tests-only
+    - uses: codecov/codecov-action@v3
+
+  node:
+    name: 'node majors, windows/mac'
+    needs: [latest, nonlatest]
+    runs-on: ubuntu-latest
+    steps:
+      - run: 'echo tests completed'

.github/workflows/rebase.yml

@@ -0,0 +1,22 @@
+name: Automatic Rebase
+
+on: [pull_request_target]
+
+permissions:
+  contents: read
+
+jobs:
+  _:
+    permissions:
+      contents: write  # for ljharb/rebase to push code to rebase
+      pull-requests: read  # for ljharb/rebase to get info about PR
+
+    name: "Automatic Rebase"
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: ljharb/rebase@master
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/require-allow-edits.yml

@@ -0,0 +1,18 @@
+name: Require “Allow Edits”
+
+on: [pull_request_target]
+
+permissions:
+  contents: read
+
+jobs:
+  _:
+    permissions:
+      pull-requests: read  # for ljharb/require-allow-edits to check 'allow edits' on PR
+
+    name: "Require “Allow Edits”"
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: ljharb/require-allow-edits@main