Overhaul a few things

.github/workflows/launchk-bins.yml

@@ -0,0 +1,30 @@
+name: launchk-bins.yml
+
+permissions:
+  contents: write
+
+on:
+  workflow_dispatch: {}
+
+jobs:
+  upload-bins:
+    strategy:
+      matrix:
+        # https://docs.github.com/en/actions/using-github-hosted-runners/using-github-hosted-runners/about-github-hosted-runners#standard-github-hosted-runners-for-public-repositories
+        include:
+          - target: x86_64-apple-darwin
+            os: macos-13
+          - target: arm64-apple-darwin
+            os: macos-14
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: taiki-e/upload-rust-binary-action@v1
+        with:
+          # (required) Comma-separated list of binary names (non-extension portion of filename) to build and upload.
+          # Note that glob pattern is not supported yet.
+          bin: launchk
+          target: ${{ matrix.target }}
+          tar: unix
+          # (required) GitHub token for uploading assets to GitHub Releases.
+          token: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/rust.yml

@@ -15,19 +15,14 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - runner: macos-12
-            xcode_version: 14.0.1         # macOS SDK: 12.3
-          - runner: macos-12
-            xcode_version: 14.2           # macOS SDK: 13.1
+          # macos-12 deprecated 2024-12-03
           - runner: macos-13
             xcode_version: 15.2           # macOS SDK: 14.2
           - runner: macos-14
             xcode_version: 15.3           # macOS SDK: 14.4
-          # optionally opt into latest stable Xcode version in future
-          # - runner: macos-14
-          #   xcode_version: latest-stable
+          - runner: macos-15
+            xcode_version: 16.3           # macOS SDK: 15.4
     runs-on: ${{ matrix.runner }}
-
     steps:
     - uses: actions/checkout@v4
     - name: Setup Xcode version