change verision

BFCommonKit.podspec

@@ -8,7 +8,7 @@
 # update framework 2021.11.1
 Pod::Spec.new do |s|
   s.name             = 'BFCommonKit'
-  s.version          = '1.6.3'
+  s.version          = '1.6.4'
   s.summary          = '基础库'
   s.swift_version    = '5.0'
   s.description      = <<-DESC