FileHandler do not support specify encoding

[iScheme4U]

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• [x] Feature Request
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Operating System? (include version)

• [x] macOS
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Python Version Requirement

• [x] I am using Python 3.6 or above

Exact Python Version?

3.8.8

Pip Version?

21.1.1

Description of your issue

FileHandler do not support specify encoding, please consider it.

Config

Include the contents of your config here (REMOVE YOUR USERNAME AND PASSWORD!) (if applicable). < REPLACE THIS TEXT