Bump podspec version, add warning flag to podspec

Our podspec needs -Wno-unsupported-availability-guard for now

FLEX.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |spec|
   spec.name             = "FLEX"
-  spec.version          = "3.1.0"
+  spec.version          = "3.1.1"
   spec.summary          = "A set of in-app debugging and exploration tools for iOS"
   spec.description      = <<-DESC
                         - Inspect and modify views in the hierarchy.
@@ -35,5 +35,6 @@ Pod::Spec.new do |spec|
   spec.frameworks       = [ "Foundation", "UIKit", "CoreGraphics", "ImageIO", "QuartzCore", "WebKit", "Security" ]
   spec.libraries        = [ "z", "sqlite3" ]
   spec.requires_arc     = true
+  spec.compiler_flags   = "-Wno-unsupported-availability-guard"
   spec.public_header_files = [ "Classes/**/FLEXManager.h", "Classes/FLEX.h" ]
 end