Add Candle backend and fix tests

.github/workflows/candle.yml

@@ -0,0 +1,23 @@
+name: Candle backend
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+
+jobs:
+  candle:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-candle-${{ github.sha }}
+      - name: Setup Rust
+        run: rustup show
+      - name: Test Candle feature
+        run: cargo test -p hotg-rune-runtime --no-default-features --features candle,builtins

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry
@@ -77,7 +77,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry
@@ -137,7 +137,7 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry

.github/workflows/releases.yml

@@ -61,7 +61,7 @@ jobs:
             asset_name: rune-macos
     steps:
       - uses: actions/checkout@v1
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             ~/.cargo/registry