Bump cryptography from 3.0 to 3.2

Bumps [cryptography](https://github.com/pyca/cryptography) from 3.0 to 3.2.
- [Release notes](https://github.com/pyca/cryptography/releases)
- [Changelog](https://github.com/pyca/cryptography/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/pyca/cryptography/compare/3.0...3.2)

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -7,7 +7,7 @@ cffi==1.14.2
 chardet==3.0.4
 click==7.1.2
 colorama==0.4.3
-cryptography==3.0
+cryptography==3.2
 docutils==0.16
 fire==0.3.1
 Flask==1.1.2