Update CocoaPods for 1.4.0 (#1257)

CGRPCZlib.podspec

@@ -2,7 +2,7 @@ Pod::Spec.new do |s|
 
     s.name = 'CGRPCZlib'
     s.module_name = 'CGRPCZlib'
-    s.version = '1.3.0'
+    s.version = '1.4.0'
     s.license = { :type => 'Apache 2.0', :file => 'LICENSE' }
     s.summary = 'Compression library that provides in-memory compression and decompression functions'
     s.homepage = 'https://www.grpc.io'

gRPC-Swift-Plugins.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
     s.name = 'gRPC-Swift-Plugins'
-    s.version = '1.3.0'
+    s.version = '1.4.0'
     s.license = { :type => 'Apache 2.0', :file => 'LICENSE' }
     s.summary = 'Swift gRPC code generator plugin binaries'
     s.homepage = 'https://www.grpc.io'

gRPC-Swift.podspec

@@ -2,7 +2,7 @@ Pod::Spec.new do |s|
 
     s.name = 'gRPC-Swift'
     s.module_name = 'GRPC'
-    s.version = '1.3.0'
+    s.version = '1.4.0'
     s.license = { :type => 'Apache 2.0', :file => 'LICENSE' }
     s.summary = 'Swift gRPC code generator plugin and runtime library'
     s.homepage = 'https://www.grpc.io'
@@ -19,11 +19,11 @@ Pod::Spec.new do |s|
 
     s.dependency 'CGRPCZlib', s.version.to_s
     s.dependency 'Logging', '>= 1.4.0', '< 2.0.0'
-    s.dependency 'SwiftNIO', '>= 2.28.0', '< 3.0.0'
+    s.dependency 'SwiftNIO', '>= 2.32.0', '< 3.0.0'
     s.dependency 'SwiftNIOExtras', '>= 1.4.0', '< 2.0.0'
-    s.dependency 'SwiftNIOHTTP2', '>= 1.16.1', '< 2.0.0'
+    s.dependency 'SwiftNIOHTTP2', '>= 1.18.2', '< 2.0.0'
     s.dependency 'SwiftNIOSSL', '>= 2.14.0', '< 3.0.0'
-    s.dependency 'SwiftNIOTransportServices', '>= 1.6.0', '< 2.0.0'
+    s.dependency 'SwiftNIOTransportServices', '>= 1.11.1', '< 2.0.0'
     s.dependency 'SwiftProtobuf', '>= 1.9.0', '< 2.0.0'
 
 end