Bump mitmproxy from 7.0.2 to 7.0.3 (#21)

Bumps [mitmproxy](https://github.com/mitmproxy/mitmproxy) from 7.0.2 to 7.0.3.
- [Release notes](https://github.com/mitmproxy/mitmproxy/releases)
- [Changelog](https://github.com/mitmproxy/mitmproxy/blob/main/CHANGELOG.md)
- [Commits](https://github.com/mitmproxy/mitmproxy/compare/v7.0.2...v7.0.3)

---
updated-dependencies:
- dependency-name: mitmproxy
  dependency-type: direct:production
...

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requirements.txt

@@ -29,7 +29,7 @@ ldap3==2.9
 llbase==1.2.11
 lxml==4.6.3
 MarkupSafe==2.0.1
-mitmproxy==7.0.2
+mitmproxy==7.0.3
 msgpack==1.0.2
 multidict==5.1.0
 numpy==1.21.0