Update macos-13 runner to 15 ahead of deprecation (#36)

* Update macos runner ahead of deprecation

* Update macos runner ahead of deprecation

Author: tvandinther

.github/workflows/build-dependencies.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ (inputs.multi-platform-build && matrix.os) || 'ubuntu-latest' }}
     strategy:
       matrix:
-        os: [ubuntu-22.04, windows-2022, macos-13]
+        os: [ubuntu-22.04, windows-2022, macos-15]
     steps:
       - uses: actions/checkout@v3
 

.github/workflows/test.yaml

@@ -18,7 +18,7 @@ jobs:
     needs: build-dependencies
     strategy:
       matrix:
-        os: [ubuntu-22.04, windows-2022, macos-13]
+        os: [ubuntu-22.04, windows-2022, macos-15]
 
     steps:
       - uses: actions/checkout@v3