Version bump in preparation for a release.

Sources/SwiftProtobuf/Version.swift

@@ -19,7 +19,7 @@ public struct Version {
   /// Major version.
   public static let major = 1
   /// Minor version.
-  public static let minor = 17
+  public static let minor = 18
   /// Revision number.
   public static let revision = 0
 

SwiftProtobuf.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name = 'SwiftProtobuf'
-  s.version = '1.17.0'
+  s.version = '1.18.0'
   s.license = { :type => 'Apache 2.0', :file => 'LICENSE.txt' }
   s.summary = 'Swift Protobuf code generator plugin and runtime library'
   s.homepage = 'https://github.com/apple/swift-protobuf'

SwiftProtobuf.xcodeproj/xcconfigs/Base.xcconfig

@@ -13,7 +13,7 @@ APPLICATION_EXTENSION_API_ONLY = YES
 DYLIB_CURRENT_VERSION = 1
 DYLIB_COMPATIBILITY_VERSION = 1
 DYLIB_INSTALL_NAME_BASE = @rpath
-CURRENT_PROJECT_VERSION = 1.17.0
+CURRENT_PROJECT_VERSION = 1.18.0
 
 // Packaging
 PRODUCT_NAME = $(TARGET_NAME)