v1.2.0

Changelog:

• Parameter INT2 is changed to INT_2. Conflict with the board Arduino Mega

• All the enum are moved inside of the i2cEncoderLibV2 class. In this way there are no conflicts with other classes with same parameter.
  Example of change:
  Before:

  Encoder.begin(INT_DATA |WRAP_DISABLE | DIRE_LEFT | IPUP_ENABLE | RMOD_X1 | RGB_ENCODER);

  Now:

  Encoder.begin(
    i2cEncoderLibV2::INT_DATA | i2cEncoderLibV2::WRAP_DISABLE
    | i2cEncoderLibV2::DIRE_LEFT | i2cEncoderLibV2::IPUP_ENABLE
    | i2cEncoderLibV2::RMOD_X1 | i2cEncoderLibV2::RGB_ENCODER);