Update actions used on GitHub Actions (#850)

Resolve some warnings from CI about using older Node runtimes.

Author: alexcrichton

.github/workflows/main.yml

@@ -46,7 +46,7 @@ jobs:
       if: matrix.target != ''
     - run: $CENTOS cargo build --release
     - run: ./ci/build-tarballs.sh "${{ matrix.build }}" "${{ matrix.target }}"
-    - uses: actions/upload-artifact@v3
+    - uses: actions/upload-artifact@v4
       with:
         name: bins-${{ matrix.build }}
         path: dist
@@ -59,7 +59,7 @@ jobs:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Install Rust
       run: rustup update stable --no-self-update && rustup default stable
     - name: Install wasm32-unknown-unknown target
@@ -98,14 +98,14 @@ jobs:
 
     - run: ci/download-teavm.sh
 
-    - uses: actions/setup-node@v2
+    - uses: actions/setup-node@v4
       with:
         node-version: '16'
-    - uses: actions/setup-java@v3
+    - uses: actions/setup-java@v4
       with:
         java-version: '18'
         distribution: 'adopt'
-    - uses: actions/setup-go@v3
+    - uses: actions/setup-go@v4
       with:
         go-version: '1.20'
     - uses: acifani/setup-tinygo@v1
@@ -133,7 +133,7 @@ jobs:
     name: Rustfmt
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Install Rust
       run: rustup update stable && rustup default stable && rustup component add rustfmt
     - name: Format source code