v2.0.0-beta.4

Changelog:

• Added the antigravity, love, and this modules from v1
• uart.read() doesn't trigger an OS error anymore if the buffer is empty (#45)
• Fixed issue where the random number generator was not being seeded and producing the same sequence of random numbers (#53)
• Fixed machine.time_pulse_us() (#26)
• Fixed pin.set_analog_period() (#54)
• Fixed issue where pin9 could not be used unless the display was disabled (#57)
• The CODAL version used has not been updated