lua: fix #673 (#676)

fix: committed incorrect puncts when user sets non-corresponding keys.
fix: lua hijacked keys when in ascii_mode
fix: handle keys correctly combined with shift

rime_ice.schema.yaml

@@ -42,8 +42,8 @@ switches:
 engine:
   processors:
     - lua_processor@select_character          # 以词定字
-    - lua_processor@auto_commit_single_punct  # 让写在 alphabet 中的某标点自动上屏
     - ascii_composer
+    - lua_processor@auto_commit_single_punct  # 让写在 alphabet 中的某标点自动上屏
     - recognizer
     - key_binder
     - speller