ci: switch to ubuntu-latest

ubuntu-18.04 is being deprecated and will soon be unavailable

.github/workflows/release.yml

@@ -86,19 +86,27 @@ jobs:
           retention-days: 1
 
   linux:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
+    container: ubuntu:18.04
     needs: tagname
     env:
       RELEASE_TAG_NAME: ${{ needs.tagname.outputs.tag_name }}
+      DEBIAN_FRONTEND: noninteractive
 
     steps:
       - uses: actions/checkout@v2
       - name: Install dependencies
         run: |
-          sudo apt-get update
-          sudo apt-get install cmake pkg-config libfontconfig-dev libgtk-3-dev
-      - name: Update rust
-        run: rustup update
+          apt-get -y update
+          apt-get -y install cmake pkg-config libfontconfig-dev libgtk-3-dev
+
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          target: x86_64-unknown-linux-gnu
+          profile: minimal
+
       - name: Build
         run: cargo build --profile release-lto --bin lapce
       - name: Gzip
@@ -241,7 +249,7 @@ jobs:
           
   publish:
     needs: [linux, linux-musl, windows, macos]
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     env:
       GH_REPO: ${{ github.repository }}
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
@@ -276,4 +284,4 @@ jobs:
         env:
           DEBUG: api
         run: |
-          gh release create $TAG_NAME $PRERELEASE --title "$TAG_NAME" --target $GITHUB_SHA lapce-macos/* lapce-linux/* lapce-proxy-linux-*/* lapce-windows/*
+          gh release create $TAG_NAME $PRERELEASE --title "$TAG_NAME" --target $GITHUB_SHA lapce-macos/* lapce-linux/* lapce-proxy-linux-*/* lapce-windows/*