Try building for the current version of macOS.

Unfortunately ffmpeg introduced the usage of ` __builtin_available` with
n5.0. Statically linking binaries with a different
`MACOSX_DEPLOYMENT_TARGET` is problematic, see
curl/curl#4314 for more details.

.github/workflows/build.yml

@@ -83,7 +83,8 @@ jobs:
              npm install -g typescript
              brew install nasm
              cargo install cargo-bundle
-          build-cmd: MACOSX_DEPLOYMENT_TARGET=10.13 cargo bundle --release
+          # build-cmd: MACOSX_DEPLOYMENT_TARGET=10.13 cargo bundle --release
+          build-cmd: cargo bundle --release
           package-files: target/release/bundle/osx/macOS.zip
           exec-file: target/release/bundle/osx/macOS.zip
           pkg-cmd: cd target/release/bundle/osx/ && zip -r macOS.zip Weylus.app