bump version

[sonichi]

Why are these changes needed?

new release

Related issue number

#639

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov-commenter]

Codecov Report

Merging #645 (d996eb5) into main (9a216b1) will increase coverage by 19.69%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##             main     #645       +/-   ##
===========================================
+ Coverage   28.73%   48.43%   +19.69%     
===========================================
  Files          27       27               
  Lines        3379     3380        +1     
  Branches      760      801       +41     
===========================================
+ Hits          971     1637      +666     
+ Misses       2337     1571      -766     
- Partials       71      172      +101     

Flag	Coverage Δ
unittests	48.22% <100.00%> (+19.54%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
autogen/oai/completion.py	16.04% <100.00%> (+0.86%)	⬆️
autogen/version.py	100.00% <100.00%> (ø)

... and 15 files with indirect coverage changes

[qingyun-wu]

openai~=1.2 is no longer giving ImportError when we import Completion from openai. Needs to revise related behavior in AutoGen as well.