Activating Open Collective

[monkeywithacupcake]

Hi, I'm making updates for Open Collective. Either you or another core contributor signed this repository up for Open Collective. This pull request adds financial contributors from your Open Collective https://opencollective.com/CollapsibleTableSectionViewController ❤️

What it does:

• adds a badge to show the latest number of financial contributors
• adds a banner displaying contributors to the project on GitHub
• adds a banner displaying all individuals contributing financially on Open Collective
• adds a section displaying all organizations contributing financially on Open Collective, with their logo and a link to their website

P.S: As with any pull request, feel free to comment or suggest changes.

Thank you for your great contribution to the Open Source community. You are awesome! 🙌
And welcome to the Open Collective community! 😊

Come chat with us in the #opensource channel on https://slack.opencollective.com - great place to ask questions and share best practices with other Open Source sustainers!

[codecov-commenter]

Codecov Report

Merging #67 into master will decrease coverage by 0.55%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #67      +/-   ##
==========================================
- Coverage   92.59%   92.03%   -0.56%     
==========================================
  Files           2        2              
  Lines         135      113      -22     
==========================================
- Hits          125      104      -21     
+ Misses         10        9       -1     

Impacted Files	Coverage Δ
...roller/CollapsibleTableSectionViewController.swift	95.23% <0.00%> (-0.87%)	⬇️
...ionViewController/CollapsibleTableViewHeader.swift	88.00% <0.00%> (+0.06%)	⬆️

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