chore: update client version to 0.2.0

[gaius-qi]

Description

Related Issue

Motivation and Context

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 35.12%. Comparing base (cc687d7) to head (b649c31).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3735      +/-   ##
==========================================
- Coverage   35.14%   35.12%   -0.02%     
==========================================
  Files         336      336              
  Lines       37852    37852              
==========================================
- Hits        13302    13295       -7     
- Misses      23721    23726       +5     
- Partials      829      831       +2     

Flag	Coverage Δ
unittests	35.12% <ø> (-0.02%)	⬇️

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

Files with missing lines	Coverage Δ
version/version.go	0.00% <ø> (ø)

... and 3 files with indirect coverage changes

[chlins]

lgtm