update roadmap

Author: cpunion

README.md

@@ -6,6 +6,31 @@
 - Typed Python objects.
 - Most intuitive and easy to use.
 
+## Roadmap
+
+- [x] Call Python in Go.
+  - [x] Basic types.
+    - [x] Integers.
+    - [x] Floats.
+    - [x] Strings.
+    - [x] Bytes.
+    - [x] Booleans.
+    - [x] Lists.
+    - [x] Tuples.
+    - [x] Dicts.
+  - [x] Modules.
+  - [ ] Functions
+    - [x] Keyword arguments.
+    - [x] Mapping arguments and return values.
+    - [ ] Default arguments.
+- [ ] Call Go in Python.
+  - [x] Export Go functions, struct types to Python.
+  - [ ] Auto export field types if it's a struct.
+  - [ ] Auto generate function signatures (used by gradio).
+- [x] Basic tests on common used libraries.
+  - [x] matplotlib
+  - [x] gradio
+
 ## Examples
 
 See the [examples](_demo).