add TSParameterProperty to typescript ast nodes (#1507)

src/typescript-ast-nodes.js

@@ -169,4 +169,7 @@ module.exports = function(fork) {
     .build("expression")
     .field("expression", def("Identifier"))
     .bases("Node");
+
+  def("TSParameterProperty")
+    .build("accessibility", "isReadonly", "parameters")
 };

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

@@ -0,0 +1,16 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`parameterProperty.ts 1`] = `
+class c3 {
+  constructor(public arg: number = 10) {
+    // fails because of comment
+  }
+}
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+class c3 {
+  constructor(public arg: number = 10) {
+    // fails because of comment
+  }
+}
+
+`;

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

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

tests/typescript/conformance/types/parameterProperty/parameterProperty.ts

@@ -0,0 +1,5 @@
+class c3 {
+  constructor(public arg: number = 10) {
+    // fails because of comment
+  }
+}