feat: add experimental support for Svelte v4

Author: ota-meshi

Diff for: .github/workflows/NodeCI.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 17.x, 18.x, 19.x]
+        node-version: [16.x, 17.x, 18.x, 19.x, 20.x]
     steps:
       - uses: actions/checkout@v3
       - uses: pnpm/action-setup@v2
@@ -35,6 +35,26 @@ jobs:
         run: pnpm install
       - name: Test
         run: pnpm run test
+  test-for-svelte-v3:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [14.x]
+    steps:
+      - uses: actions/checkout@v3
+      - uses: pnpm/action-setup@v2
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Install Svelte v3
+        run: |+
+          pnpm install -D svelte@3
+          rm -rf node_modules
+      - name: Install Packages
+        run: pnpm install
+      - name: Test
+        run: pnpm run test
   test-for-ts-eslint-v4:
     runs-on: ubuntu-latest
     strategy:
@@ -49,7 +69,7 @@ jobs:
           node-version: ${{ matrix.node-version }}
       - name: Install @typescript-eslint v4
         run: |+
-          pnpm install -D @typescript-eslint/parser@4 @typescript-eslint/eslint-plugin@4 eslint@7
+          pnpm install -D @typescript-eslint/parser@4 @typescript-eslint/eslint-plugin@4 eslint@7 svelte@3
           rm -rf node_modules
       - name: Install Packages
         run: pnpm install
@@ -69,7 +89,7 @@ jobs:
           node-version: ${{ matrix.node-version }}
       - name: Install eslint v7
         run: |+
-          pnpm install -D eslint@7
+          pnpm install -D eslint@7 svelte@3
           rm -rf node_modules
       - name: Install Packages
         run: pnpm install

Diff for: package.json

@@ -45,7 +45,7 @@
     "version:ci": "env-cmd -e version-ci pnpm run build:meta && changeset version"
   },
   "peerDependencies": {
-    "svelte": "^3.37.0"
+    "svelte": "^3.37.0 || ^4.0.0-0"
   },
   "peerDependenciesMeta": {
     "svelte": {
@@ -89,7 +89,6 @@
     "eslint-plugin-prettier": "^4.0.0",
     "eslint-plugin-regexp": "^1.5.0",
     "eslint-plugin-svelte": "^2.28.0",
-    "eslint-plugin-svelte3": "^4.0.0",
     "eslint-plugin-yml": "^1.0.0",
     "estree-walker": "^3.0.0",
     "locate-character": "^2.0.5",
@@ -99,11 +98,11 @@
     "nyc": "^15.1.0",
     "prettier": "^2.8.0",
     "prettier-plugin-pkg": "^0.17.0",
-    "prettier-plugin-svelte": "^2.10.0",
+    "prettier-plugin-svelte": "^2.10.1",
     "rimraf": "^5.0.0",
     "semver": "^7.3.5",
-    "svelte": "^3.57.0",
-    "svelte2tsx": "^0.6.11",
+    "svelte": "^4.0.0-0",
+    "svelte2tsx": "^0.6.15",
     "typescript": "~5.0.0",
     "typescript-eslint-parser-for-extra-files": "^0.5.0",
     "vue-eslint-parser": "^9.0.0"