v2.5.6

Changes:

• c252616 install pyaudio for 3.7 and build win binary with 3.7 (#620)
• 9ef4d1a Use PyInstaller and InnoSetup for Windows binaries (#618)
• 8ea7feb fix center detection crash on special signals (fix #615)
• 8666216 update requirements.txt for linux (#617)
• 3966d56 Update CI (#614)

This list of changes was auto generated.