Pycocos

Add a method to refresh token due to the recent change on token expiration.

**Full Changelog**: https://github.com/nacho-herrera/pyCocos/compare/v0.2.10...v0.2.11

**Full Changelog**: https://github.com/nacho-herrera/pyCocos/compare/v0.2.8...v0.2.10

fixes 15

**Full Changelog**: https://github.com/nacho-herrera/pyCocos/compare/v0.2.8...v0.2.9

Fix a bug that prevent getting instrument list.
Fix bug that occurs when sending buy orders on USD MEP currency.

What's Changed
* get_tickers_list method won't work. A proposal. by MartinBasualdo0 in https://github.com/nacho-herrera/pyCocos/pull/11

New Contributors
* MartinBasualdo0 made their first contribution in https://github.com/nacho-herrera/pyCocos/pull/11

**Full Changelog**: https://github.com/nacho-herrera/pyCocos/compare/v0.2.5...v0.2.6