Gem updates

⚠️ Required Ruby version >= 2.7.2 ⚠️

Gem updates:

• OAuth2
• Rake
• RSpec
• Rubocop
• Webmock

What's Changed

• GitHub Actions workflow by @HGebhardt in #8
• Bump webmock from 3.12.2 to 3.14.0 by @dependabot in #5
• Bump rubocop from 1.14.0 to 1.19.0 by @dependabot in #3
• Bump rake from 13.0.3 to 13.0.6 by @dependabot in #4
• Bump oauth2 from 1.4.4 to 1.4.7 by @dependabot in #7
• Bump rubocop from 1.19.0 to 1.20.0 by @dependabot in #10
• Bump rubocop from 1.20.0 to 1.22.3 by @dependabot in #16
• Bump rubocop from 1.22.3 to 1.24.1 by @dependabot in #19
• Bump rubocop from 1.24.1 to 1.25.1 by @dependabot in #23
• Bump rspec from 3.10.0 to 3.11.0 by @dependabot in #24
• Bump oauth2 from 1.4.7 to 1.4.9 by @dependabot in #26

Full Changelog: v0.2.0...v0.3.0