[ BUG ] json responses with charset specification in the content-type isn't parsed as json

[hod-alpert]

Describe the bug
When performing requests via the perform_request method It checks if content-type is application/json, and if so - return the json parsed response.

returning_content_type = response.headers.get('content-type')
if returning_content_type == "application/json":
    content_return = Result()(response.status_code, response.headers, response.json())

But when response's content-type has charset specification (i.e content-type: application/json; charset=utf-8) it ignores it and return the bytes content instead of a dict.
To Reproduce
Make a graphql request via IdentityProtection.

from falconpy import IdentityProtection
falcon = IdentityProtection(client_id=client_id, client_secret=client_secret)
query = """{
  entities(types: [USER],
  minRiskScoreSeverity: NORMAL,
  sortKey: RISK_SCORE,
  sortOrder: DESCENDING,
  first: 1000) {
    nodes {
      ... on UserEntity {
        emailAddresses
        riskScoreSeverity
      }
    }
    pageInfo {
      endCursor
      hasNextPage
    }
  }
}
"""
resp = falcon.graphql(query=query)

Expected behavior
Instead of checking exact match - checking for application/json prefix in the content-type header.

Environment (please complete the following information):

• OS: Linux
• Python: 3.9
• FalconPy: 1.1.4

[jshcodes]

This is a good catch.

Thank you for reporting and resolving this! Your pull request is under review now. 😄