Update build number

Signal.xcodeproj/project.pbxproj

@@ -4262,7 +4262,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 50;
+				CURRENT_PROJECT_VERSION = 53;
 				DEVELOPMENT_TEAM = SUQ8J2PCT7;
 				FRAMEWORK_SEARCH_PATHS = "$(inherited)";
 				GCC_C_LANGUAGE_STANDARD = gnu11;
@@ -4323,7 +4323,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 50;
+				CURRENT_PROJECT_VERSION = 53;
 				DEVELOPMENT_TEAM = SUQ8J2PCT7;
 				ENABLE_NS_ASSERTIONS = NO;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -4376,7 +4376,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 50;
+				CURRENT_PROJECT_VERSION = 53;
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = SUQ8J2PCT7;
 				DYLIB_COMPATIBILITY_VERSION = 1;
@@ -4444,7 +4444,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				CODE_SIGN_STYLE = Automatic;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 50;
+				CURRENT_PROJECT_VERSION = 53;
 				DEFINES_MODULE = YES;
 				DEVELOPMENT_TEAM = SUQ8J2PCT7;
 				DYLIB_COMPATIBILITY_VERSION = 1;
@@ -4652,7 +4652,7 @@
 				CODE_SIGN_ENTITLEMENTS = Signal/Signal.entitlements;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				CURRENT_PROJECT_VERSION = 50;
+				CURRENT_PROJECT_VERSION = 53;
 				DEVELOPMENT_TEAM = SUQ8J2PCT7;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -4719,7 +4719,7 @@
 				CODE_SIGN_ENTITLEMENTS = Signal/Signal.entitlements;
 				CODE_SIGN_IDENTITY = "iPhone Developer";
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
-				CURRENT_PROJECT_VERSION = 50;
+				CURRENT_PROJECT_VERSION = 53;
 				DEVELOPMENT_TEAM = SUQ8J2PCT7;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",