Feat/ensure tokens uniqueness

[aarmoa]

• Changed the code that loads markets and tokens in the AsyncClient to ensure there are no duplicate tokens for the same token denom

[codecov]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (c57e1ce) 56.64% compared to head (f5d44a5) 56.63%.

Files	Patch %	Lines
pyinjective/async_client.py	78.94%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #272      +/-   ##
==========================================
- Coverage   56.64%   56.63%   -0.01%     
==========================================
  Files          18       18              
  Lines        2076     2071       -5     
  Branches      241      238       -3     
==========================================
- Hits         1176     1173       -3     
  Misses        863      863              
+ Partials       37       35       -2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.