Support the Keyword type (#2056)

This is an issue in https://github.com/eslint/typescript-eslint-parser/issues/315

Fixes #2049

src/printer.js

@@ -1625,6 +1625,9 @@ function genericPrintNoParens(path, options, print, args) {
         requiresHardline ? hardline : ""
       ]);
     }
+    case "Keyword": {
+      return n.name;
+    }
     case "TypeAnnotatedIdentifier":
       return concat([
         path.call(print, "annotation"),

tests/typescript_tsx/__snapshots__/jsfmt.spec.js.snap

@@ -1,5 +1,14 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`keyword.tsx 1`] = `
+<try />;
+<object />
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+<try />;
+<object />;
+
+`;
+
 exports[`not-react.ts 1`] = `
 /// <reference types="node" />
 

tests/typescript_tsx/keyword.tsx

@@ -0,0 +1,2 @@
+<try />;
+<object />