Release 2.7.2

• 195b472 - docs: fix sections
• e1d0724 - Merge branch 'master' of https://github.com/joolfe/postman-to-openapi into develop
• 2e7b31d - Feat: support example body undefined
• 4db9a32 - docs: update changelog
• e5cfeaf - Merge pull request #238 from joolfe/develop