Update the yml files to meet Xcode 15 and Node 20 requirements (LoopKit#124)

* update for Xcode 15, even in comments, and node 20 in actions

* bump up to macos-14 and Xcode 15.3, now available

Author: marionbarker

.github/workflows/add_identifiers.yml

@@ -10,15 +10,11 @@ jobs:
 
   identifiers:
     needs: secrets
-    runs-on: macos-12
+    runs-on: macos-14
     steps:
-      # Uncomment to manually select latest Xcode if needed
-      #- name: Select Latest Xcode
-      #  run: "sudo xcode-select --switch /Applications/Xcode_13.0.app/Contents/Developer"
-      
       # Checks-out the repo
       - name: Checkout Repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # Patch Fastlane Match to not print tables
       - name: Patch Match Tables

.github/workflows/build_loop.yml

@@ -17,15 +17,15 @@ jobs:
 
   build:
     needs: secrets
-    runs-on: macos-12
+    runs-on: macos-14
     steps:
       # Uncomment to manually select latest Xcode if needed
       - name: Select Latest Xcode
-        run: "sudo xcode-select --switch /Applications/Xcode_14.1.app/Contents/Developer"
+        run: "sudo xcode-select --switch /Applications/Xcode_15.3.app/Contents/Developer"
 
       # Checks-out the repo
       - name: Checkout Repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
         with:
           submodules: recursive
 
@@ -101,7 +101,7 @@ jobs:
 
       # Upload IPA and Symbols
       - name: Upload IPA and Symbol artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: build-artifacts
           path: |

.github/workflows/create_certs.yml

@@ -10,15 +10,11 @@ jobs:
 
   certificates:
     needs: secrets
-    runs-on: macos-12
+    runs-on: macos-14
     steps:
-      # Uncomment to manually select latest Xcode if needed
-      #- name: Select Latest Xcode
-      #  run: "sudo xcode-select --switch /Applications/Xcode_13.0.app/Contents/Developer"
-      
       # Checks-out the repo
       - name: Checkout Repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # Patch Fastlane Match to not print tables
       - name: Patch Match Tables

.github/workflows/validate_secrets.yml

@@ -4,11 +4,11 @@ on: [workflow_call, workflow_dispatch]
 
 jobs:
   validate:
-    runs-on: macos-12
+    runs-on: macos-14
     steps:
       # Checks-out the repo
       - name: Checkout Repo
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       # Sync the GitHub runner clock with the Windows time server (workaround as suggested in https://github.com/actions/runner/issues/2996)
       - name: Sync clock