watchOS minimum target is 4.0

CryptoSwift.podspec

@@ -12,7 +12,7 @@ Pod::Spec.new do |s|
   s.swift_version = "5.6"
   s.ios.deployment_target = "11.0"
   s.osx.deployment_target = "10.12"
-  s.watchos.deployment_target = "2.0"
+  s.watchos.deployment_target = "4.0"
   s.tvos.deployment_target = "11.0"
   s.source_files  = "Sources/CryptoSwift/**/*.swift"
   s.requires_arc = true

config/Project-Shared.xcconfig

@@ -10,7 +10,7 @@ TARGETED_DEVICE_FAMILY = 1,2,3,4
 TVOS_DEPLOYMENT_TARGET = 11.0
 IPHONEOS_DEPLOYMENT_TARGET = 11.0
 MACOSX_DEPLOYMENT_TARGET = 10.12
-WATCHOS_DEPLOYMENT_TARGET = 2.0
+WATCHOS_DEPLOYMENT_TARGET = 4.0
 
 DEVELOPMENT_TEAM =
 //PROVISIONING_PROFILE =