v0.3

• Add express_raw_interest function to NDNApp.
• Add validator for known keys.
• Add CodeQL scanning.
• Add support to Windows CNG as a TPM backend.
• Add binary tools pyndntools, pyndnsec and pynfdc.
• Transition to Name Convention Rev03.
• Add automatic type conversion for Enum, Flag and str.
• Drop Python 3.7 support and add Python 3.10.