fix deployment target and swift version for share extension

deltachat-ios.xcodeproj/project.pbxproj

@@ -1573,14 +1573,14 @@
 				DEVELOPMENT_TEAM = 8Y86453UA8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = DcShare/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 13.4;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
 				MTL_FAST_MATH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.delta.DcShare;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Debug;
@@ -1595,13 +1595,13 @@
 				DEVELOPMENT_TEAM = 8Y86453UA8;
 				ENABLE_BITCODE = NO;
 				INFOPLIST_FILE = DcShare/Info.plist;
-				IPHONEOS_DEPLOYMENT_TARGET = 13.4;
+				IPHONEOS_DEPLOYMENT_TARGET = 11.0;
 				LD_RUNPATH_SEARCH_PATHS = "$(inherited) @executable_path/Frameworks @executable_path/../../Frameworks";
 				MTL_FAST_MATH = YES;
 				PRODUCT_BUNDLE_IDENTIFIER = chat.delta.DcShare;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SKIP_INSTALL = YES;
-				SWIFT_VERSION = 5.0;
+				SWIFT_VERSION = 4.2;
 				TARGETED_DEVICE_FAMILY = "1,2";
 			};
 			name = Release;