KDSoap 2.1.0

General:

• Re-license project to MIT and remove the commercial offering
• buildsystem - Increase minimum CMake version to 3.12.0
• buildsystem - Build in Release mode by default (in non-developer situations)

Client-side:

• Generate "explicit" in front of service and job constructors (issue #206)

Server-side:

• Disable HTTP/2 support (which Qt 6 enables by default), it causes trouble with some SOAP servers (issue #246).
• Improve parsing of GET argument to avoid misinterpreting queries (possible security issue #247).