Merge pull request swiftlang#320 from JohnEstropia/master

Added Swift 4.2 commit for CoreStore

Author: Zachary 'Clack' Cole

projects.json

@@ -343,6 +343,10 @@
       {
         "version": "4.0",
         "commit": "83e6082c5646c5eb4d3130ce575ab858df168c59"
+      },
+      {
+        "version": "4.2",
+        "commit": "2863605d845cd9bb255ddd91f47f92717dec637f"
       }
     ],
     "platforms": [
@@ -378,13 +382,6 @@
         "destination": "generic/platform=watchOS",
         "configuration": "Release"
       },
-      {
-        "action": "BuildXcodeWorkspaceScheme",
-        "workspace": "CoreStore.xcworkspace",
-        "scheme": "CoreStoreDemo",
-        "destination": "generic/platform=iOS",
-        "configuration": "Release"
-      },
       {
         "action": "TestXcodeWorkspaceScheme",
         "workspace": "CoreStore.xcworkspace",