feat: Upgrade Xcode project version

Sources/Earthquake Network.xcodeproj/project.pbxproj

@@ -3,7 +3,7 @@
 	archiveVersion = 1;
 	classes = {
 	};
-	objectVersion = 54;
+	objectVersion = 77;
 	objects = {
 
 /* Begin PBXBuildFile section */
@@ -1354,7 +1354,6 @@
 				};
 			};
 			buildConfigurationList = 8CBD3DBD2149B9AD0070C963 /* Build configuration list for PBXProject "Earthquake Network" */;
-			compatibilityVersion = "Xcode 8.0";
 			developmentRegion = en;
 			hasScannedForEncodings = 0;
 			knownRegions = (
@@ -1378,6 +1377,7 @@
 				65B16E282BDFB39B0020527E /* XCRemoteSwiftPackageReference "facebook-ios-sdk" */,
 				65E6AC6C2C2DB3B60073F8FE /* XCRemoteSwiftPackageReference "firebase-ios-sdk" */,
 			);
+			preferredProjectObjectVersion = 77;
 			productRefGroup = 8CBD3DC32149B9AD0070C963 /* Products */;
 			projectDirPath = "";
 			projectReferences = (