Update all the things

* drop Node.js < 12 support
* updated all dependencies
* dropped unused devDependencies
* lint
* switch to GitHub Actions CI
* normalize whitespace
* ...and more

.editorconfig

@@ -1,24 +1,21 @@
 # editorconfig.org
+# top-most EditorConfig file
 root = true
 
 [*]
+charset = utf-8
 end_of_line = lf
-indent_style = tab
 indent_size = 4
-charset = utf-8
-trim_trailing_whitespace = true
-insert_final_newline = true
-
-[.htaccess]
 indent_style = space
-indent_size = 4
+insert_final_newline = true
+trim_trailing_whitespace = true
 
-[*.json]
-indent_style = space
+[{*.json,*.yml,*.yaml}]
 indent_size = 2
 
 [*.md]
 trim_trailing_whitespace = false
+indent_size = 2
 
 [test/fixtures/*]
 insert_final_newline = false

.gitattributes

@@ -1 +1,2 @@
-* text=auto
+# Enforce Unix newlines
+* text=auto eol=lf

.github/workflows/codeql.yml

@@ -0,0 +1,35 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches:
+      - main
+      - "!dependabot/**"
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches:
+      - main
+      - "!dependabot/**"
+  schedule:
+    - cron: "0 0 * * 0"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v1
+        with:
+          languages: "javascript"
+
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v1
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v1

.github/workflows/lint.yml

@@ -0,0 +1,27 @@
+name: Lint
+
+on: [push, pull_request]
+
+env:
+  FORCE_COLOR: 2
+  NODE: 14 # The Node.js version to run lint on
+
+jobs:
+  run:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ env.NODE }}
+          cache: npm
+
+      - name: Install npm dependencies
+        run: npm ci
+
+      - name: Run lint
+        run: npm run lint

.github/workflows/test.yml

@@ -0,0 +1,40 @@
+name: Tests
+
+on: [push, pull_request]
+
+env:
+  FORCE_COLOR: 2
+
+jobs:
+  test:
+    name: Node ${{ matrix.node }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        node: [12, 14, 16]
+        os: [ubuntu-latest, windows-latest]
+
+    steps:
+      - name: Clone repository
+        uses: actions/checkout@v2
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node }}
+          cache: npm
+
+      - name: Install npm dependencies
+        run: npm ci
+
+      - name: Run tests
+        run: npm test
+
+      - name: Upload screenshots
+        uses: actions/upload-artifact@v2
+        if: failure()
+        with:
+          name: gulp-svg-sprite-ci-${{ matrix.node }}-${{ github.sha }}
+          path: tmp/

.gitignore

@@ -2,8 +2,8 @@
 /.settings
 /.buildpath
 /.idea
-/node_modules
+/node_modules/
 /npm-debug.log
-/tmp
+/tmp/
 *.md.html
-**/*.md.html
+**/*.md.html