Updated swift version.

Author: NidhiDixit09

BranchSDK.xcodeproj/project.pbxproj

@@ -2092,6 +2092,7 @@
 				DEVELOPMENT_TEAM = R63EM248DP;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -2102,6 +2103,7 @@
 				DEVELOPMENT_TEAM = R63EM248DP;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
@@ -2412,6 +2414,7 @@
 				DEVELOPMENT_TEAM = R63EM248DP;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -2422,6 +2425,7 @@
 				DEVELOPMENT_TEAM = R63EM248DP;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
@@ -2432,6 +2436,7 @@
 				DEVELOPMENT_TEAM = R63EM248DP;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -2442,6 +2447,7 @@
 				DEVELOPMENT_TEAM = R63EM248DP;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};
@@ -2452,6 +2458,7 @@
 				DEVELOPMENT_TEAM = R63EM248DP;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Debug;
 		};
@@ -2462,6 +2469,7 @@
 				DEVELOPMENT_TEAM = R63EM248DP;
 				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				SWIFT_VERSION = 4.0;
 			};
 			name = Release;
 		};