📝 Update README

README.md

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 # Ruby OAuth
 
+[![Liberapay Goal Progress][⛳liberapay-img]][⛳liberapay] [![Sponsor Me on Github][🖇sponsor-img]][🖇sponsor] [![Buy me a coffee][🖇buyme-small-img]][🖇buyme] [![Donate on Polar][🖇polar-img]][🖇polar] [![Donate to my FLOSS or refugee efforts at ko-fi.com][🖇kofi-img]][🖇kofi] [![Donate to my FLOSS or refugee efforts using Patreon][🖇patreon-img]][🖇patreon]
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+---
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+[⛳liberapay-img]: https://img.shields.io/liberapay/goal/pboling.svg?logo=liberapay
+[⛳liberapay]: https://liberapay.com/pboling/donate
+[🖇sponsor-img]: https://img.shields.io/badge/Sponsor_Me!-pboling.svg?style=social&logo=github
+[🖇sponsor]: https://github.com/sponsors/pboling
+[🖇polar-img]: https://img.shields.io/badge/polar-donate-yellow.svg
+[🖇polar]: https://polar.sh/pboling
+[🖇kofi-img]: https://img.shields.io/badge/a_more_different_coffee-✓-yellow.svg
+[🖇kofi]: https://ko-fi.com/O5O86SNP4
+[🖇patreon-img]: https://img.shields.io/badge/patreon-donate-yellow.svg
+[🖇patreon]: https://patreon.com/galtzo
+[🖇buyme-small-img]: https://img.shields.io/badge/buy_me_a_coffee-✓-yellow.svg?style=flat
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 OAuth 1.0 is an industry-standard protocol for authorization.
 
 This is a RubyGem for implementing both OAuth 1.0 clients and servers in Ruby applications.