Smtpapi

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**Library - Docs**
- [PR 57](https://github.com/sendgrid/smtpapi-python/pull/57): Few typos and grammatical mistake corrected. Thanks to [yudhik11](https://github.com/yudhik11)!
- [PR 61](https://github.com/sendgrid/smtpapi-python/pull/61): Add pull request info to CONTRIBUTING and README. Thanks to [shorrock](https://github.com/shorrock)!

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**Library - Docs**
- [PR 72](https://github.com/sendgrid/smtpapi-python/pull/72): Fix .md with Grammar.ly. Thanks to [ssiddhantsharma](https://github.com/ssiddhantsharma)!
- [PR 70](https://github.com/sendgrid/smtpapi-python/pull/70): Correct *.md files using Grammarly. Thanks to [myzeprog](https://github.com/myzeprog)!

**Library - Chore**
- [PR 105](https://github.com/sendgrid/smtpapi-python/pull/105): update GitHub branch references to use HEAD. Thanks to [thinkingserious](https://github.com/thinkingserious)!

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**Library - Fix**
- [PR 86](https://github.com/sendgrid/smtpapi-python/pull/86): Fix and add flake8 to CI. Thanks to [hugovk](https://github.com/hugovk)!

**Library - Docs**
- [PR 99](https://github.com/sendgrid/smtpapi-python/pull/99): add use cases directory and README.md file for use cases. Thanks to [mtroiani](https://github.com/mtroiani)!

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**Library - Chore**
- [PR 104](https://github.com/sendgrid/smtpapi-python/pull/104): add Python 3.8 to Travis. Thanks to [childish-sambino](https://github.com/childish-sambino)!

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**Library - Fix**
- [PR 53](https://github.com/sendgrid/smtpapi-python/pull/53): "similar-code" issue in smtpapi/__init__.py. Thanks to [andre8359](https://github.com/andre8359)!

**Library - Docs**
- [PR 88](https://github.com/sendgrid/smtpapi-python/pull/88): Fix typos and grammatical errors. Thanks to [vinayak42](https://github.com/vinayak42)!

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**Library - Fix**
- [PR 103](https://github.com/sendgrid/smtpapi-python/pull/103): travis update for autodeploy. Thanks to [thinkingserious](https://github.com/thinkingserious)!