`oauth_signature` not encoded in versions 1.2.0 and 1.3.0

ech0s7r commented 3 years ago

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This PR contains the following changes:

Code cleanup (format, indentation, ...)
Fix issue https://github.com/Mastercard/oauth1-signer-python/issues/35 (revert change introduced with https://github.com/Mastercard/oauth1-signer-python/pull/30)
Fixed security hotspot python:S2245
Keep the behavior consistent with other signer libs when encoding URL and params (URL and params should be percent-encoded and only query string should be encoded during params normalization)
The OAuth1RSA module reuse the core functions instead of redefining them
sha256_encode: added support for byte payload
The oauth_signature param in the Authorization header should be RFC-3986 encoded
Moved nonce and timestamp generation function into the utils module
get_authorization_header method is now static
Improved code coverage
Added pycodestyle GitHub workflow and fixed sonar scan not running on pull requests