add TSTypeParameter to typescript ast nodes (#1508)

src/typescript-ast-nodes.js

@@ -169,6 +169,10 @@ module.exports = function(fork) {
     .build("expression")
     .field("expression", def("Identifier"))
     .bases("Node");
+  
+  def("TSTypeParameter")
+    .build("name")
+    .field("name", def("Identifier"))
 
   def("TSParameterProperty")
     .build("accessibility", "isReadonly", "parameters")

tests/typescript/conformance/types/typeParameter/__snapshots__/jsfmt.spec.js.snap

@@ -0,0 +1,12 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`typeParameter.ts 1`] = `
+interface IObservable<T> {
+  n: IObservable<T[]> // fails because of comment
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+interface IObservable<T> {
+  n: IObservable<T[]> // fails because of comment
+}
+
+`;

tests/typescript/conformance/types/typeParameter/jsfmt.spec.js

@@ -0,0 +1 @@
+run_spec(__dirname, { parser: "typescript" });

tests/typescript/conformance/types/typeParameter/typeParameter.ts

@@ -0,0 +1,3 @@
+interface IObservable<T> {
+  n: IObservable<T[]> // fails because of comment
+}