ci: upgrade macOS version (#42)

Author: AngryMaciek

.github/workflows/include.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-10.15, ubuntu-20.04]
+        os: [macos-12, ubuntu-20.04]
     env:
       working-directory: .test/include
 

.github/workflows/install.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-10.15, ubuntu-20.04]
+        os: [macos-12, ubuntu-20.04]
     env:
       test-directory: .test/install
       lib-directory: "hypercomplex"

.github/workflows/unit.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-10.15, ubuntu-20.04]
+        os: [macos-12, ubuntu-20.04]
       fail-fast: false
     env:
       working-directory: .test/unit