fix: several bugs detected in ts-parser (cloudwego#101)

* fix bug: cannot identify export default arrow function

* fix bug: if two files has same symbol name, should give a mangled name

* 1. revert import path changes 2. fix bug: falsy caching strategy in  function,

* chore: modify package version

Author: angrychow

ts-parser/.gitignore

@@ -8,4 +8,6 @@ temp/
 
 output.json
 
-output/
+output/
+
+package-lock.json