Fix typeof usecase (#23)

* adds failing example of typeof usage

* fixes problem with parsing typeof paths

Author: petegleeson

__snapshots__/test.js.snap

@@ -2957,6 +2957,44 @@ Object {
 }
 `;
 
+exports[`typeof statements 1`] = `
+Object {
+  "classes": Array [
+    Object {
+      "kind": "object",
+      "members": Array [
+        Object {
+          "key": Object {
+            "kind": "id",
+            "name": "a",
+          },
+          "kind": "property",
+          "optional": false,
+          "value": Object {
+            "kind": "typeof",
+            "name": undefined,
+            "type": Object {
+              "kind": "generic",
+              "value": Object {
+                "kind": "number",
+                "referenceIdName": "one",
+                "value": 1,
+              },
+            },
+          },
+        },
+      ],
+      "name": Object {
+        "kind": "id",
+        "name": "Component",
+        "type": null,
+      },
+    },
+  ],
+  "kind": "program",
+}
+`;
+
 exports[`unary operator 1`] = `
 Object {
   "classes": Array [

index.js

@@ -338,7 +338,7 @@ converters.NewExpression = (path, context) /*: K.New*/ => {
 };
 
 converters.TypeofTypeAnnotation = (path, context) /*: K.Typeof*/ => {
-  let type = convert(path.get("argument"), context);
+  let type = convert(path.get("argument"), {...context, mode: 'value' });
   return {
     kind: "typeof",
     type,

test.js

@@ -822,7 +822,16 @@ const TESTS = [
         }
       }
     `
-  }
+  },
+  {
+    name: "typeof statements",
+    typeSystem: "flow",
+    code: `
+      const one = 1;
+
+      class Component extends React.Component<{ a: typeof one }> {}
+  `
+  },
 ];
 
 for (let testCase of TESTS) {