ReactiveObjC: raise deployment target to 12.0.

Raise them all and not only iOS to stop Xcode copmplainging about:
"update to recommended settings".

Author: arangato

ReactiveObjC.xcodeproj/project.pbxproj

@@ -2771,12 +2771,12 @@
 				CODE_SIGNING_REQUIRED = NO;
 				CURRENT_PROJECT_VERSION = 1;
 				ENABLE_TESTABILITY = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.reactivecocoa.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(PROJECT_NAME)";
 				RUN_CLANG_STATIC_ANALYZER = NO;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 				WARNING_CFLAGS = (
@@ -2800,12 +2800,12 @@
 				CODE_SIGNING_REQUIRED = NO;
 				CURRENT_PROJECT_VERSION = 1;
 				GCC_OPTIMIZATION_LEVEL = 0;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.reactivecocoa.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(PROJECT_NAME)";
 				RUN_CLANG_STATIC_ANALYZER = NO;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 				WARNING_CFLAGS = (
@@ -2932,12 +2932,12 @@
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CODE_SIGNING_REQUIRED = NO;
 				CURRENT_PROJECT_VERSION = 1;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.reactivecocoa.$(PRODUCT_NAME:rfc1034identifier)";
 				PRODUCT_NAME = "$(PROJECT_NAME)";
 				RUN_CLANG_STATIC_ANALYZER = NO;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 				WARNING_CFLAGS = (
@@ -3012,12 +3012,12 @@
 				CLANG_WARN_STRICT_PROTOTYPES = YES;
 				CODE_SIGNING_REQUIRED = NO;
 				CURRENT_PROJECT_VERSION = 1;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.0;
+				IPHONEOS_DEPLOYMENT_TARGET = 12.0;
 				MACOSX_DEPLOYMENT_TARGET = 10.9;
 				PRODUCT_BUNDLE_IDENTIFIER = "org.reactivecocoa.$(PRODUCT_NAME:rfc1034identifier)-Tests";
 				PRODUCT_NAME = "$(PROJECT_NAME)";
 				RUN_CLANG_STATIC_ANALYZER = NO;
-				TVOS_DEPLOYMENT_TARGET = 9.0;
+				TVOS_DEPLOYMENT_TARGET = 12.0;
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
 				WARNING_CFLAGS = (