chore: update the macos version in github actions (#461)

Author: jaeopt

.github/workflows/unit_tests.yml

@@ -7,7 +7,7 @@ env:
 
 jobs:
   unittests:
-    runs-on: macos-10.15
+    runs-on: macos-11
     strategy:
       fail-fast: false
       matrix:

DemoSwiftApp/DemoSwiftApp.xcodeproj/xcshareddata/xcschemes/DemoSwiftwatchOS.xcscheme

@@ -54,46 +54,33 @@
       debugDocumentVersioning = "YES"
       debugServiceExtension = "internal"
       allowLocationSimulation = "YES">
-      <RemoteRunnable
-         runnableDebuggingMode = "2"
-         BundleIdentifier = "com.apple.Carousel"
-         RemotePath = "/DemoSwiftwatchOS WatchKit App">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "75C71C4D25E45A960084187E"
             BuildableName = "DemoSwiftwatchOS WatchKit App.app"
             BlueprintName = "DemoSwiftwatchOS WatchKit App"
             ReferencedContainer = "container:DemoSwiftApp.xcodeproj">
          </BuildableReference>
-      </RemoteRunnable>
+      </BuildableProductRunnable>
    </LaunchAction>
    <ProfileAction
       buildConfiguration = "Release"
       shouldUseLaunchSchemeArgsEnv = "YES"
       savedToolIdentifier = ""
       useCustomWorkingDirectory = "NO"
       debugDocumentVersioning = "YES">
-      <RemoteRunnable
-         runnableDebuggingMode = "2"
-         BundleIdentifier = "com.apple.Carousel"
-         RemotePath = "/DemoSwiftwatchOS WatchKit App">
+      <BuildableProductRunnable
+         runnableDebuggingMode = "0">
          <BuildableReference
             BuildableIdentifier = "primary"
             BlueprintIdentifier = "75C71C4D25E45A960084187E"
             BuildableName = "DemoSwiftwatchOS WatchKit App.app"
             BlueprintName = "DemoSwiftwatchOS WatchKit App"
             ReferencedContainer = "container:DemoSwiftApp.xcodeproj">
          </BuildableReference>
-      </RemoteRunnable>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "75C71C4D25E45A960084187E"
-            BuildableName = "DemoSwiftwatchOS WatchKit App.app"
-            BlueprintName = "DemoSwiftwatchOS WatchKit App"
-            ReferencedContainer = "container:DemoSwiftApp.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
+      </BuildableProductRunnable>
    </ProfileAction>
    <AnalyzeAction
       buildConfiguration = "Debug">