Merge pull request #550 from ahoppen/pr/tokenkind-hashable

Mark `TokenKind` as `Hashable`

Author: ahoppen

Sources/SwiftSyntax/TokenKind.swift.gyb

@@ -18,7 +18,7 @@
 //===----------------------------------------------------------------------===//
 
 /// Enumerates the kinds of tokens in the Swift language.
-public enum TokenKind {
+public enum TokenKind: Hashable {
   case eof
 % for token in SYNTAX_TOKENS:
 %   kind = token.swift_kind()

Sources/SwiftSyntax/gyb_generated/TokenKind.swift

@@ -13,7 +13,7 @@
 //===----------------------------------------------------------------------===//
 
 /// Enumerates the kinds of tokens in the Swift language.
-public enum TokenKind {
+public enum TokenKind: Hashable {
   case eof
   case associatedtypeKeyword
   case classKeyword