v5.7

What's Changed

• Remove deprecated classes by @leif81 in #126
• Electromagnetic Emission PDU fixes to support multiple electronic emitters (DIS 7) by @fo-ifad in #127
• Signal Pdu fixes for encoding scheme and radio reference id (DIS 7) by @fo-ifad in #129
• Transmitter PDU fixes for modulation and antenna patterns (DIS 7) by @fo-ifad in #128
• Receiver PDU fix for missing Radio Ref Id and Radio Number (DIS 7) by @fo-ifad in #130
• Add IFF PDU (DIS 7) by @fo-ifad in #131

Full Changelog: v5.6...v5.7