Added support for yeelink.light.lamp1 and qmi.powerstrip.v1 devices

[uswong]

Added support for yeelink.light.lamp1 and qmi.powerstrip.v1 devices. This resolves the issue #873.

The following lines are added to miio2miot_specs.py in order to support the above two devices:

  'yeelink.light.lamp1': {
      'miio_specs': {
          'prop.2.1': {'prop': 'power', 'setter': True, 'format': 'onoff'},
          'prop.2.2': {'prop': 'bright', 'setter': True},
          'prop.2.3': {'prop': 'ct', 'setter': 'set_ct_abx', 'set_template': '{{ [value,"smooth",500] }}'},
          'prop.2.4': {'prop': 'color_mode'},
      },
  },

and

  'qmi.powerstrip.v1': {
      'miio_specs': {
          'prop.2.1': {'prop': 'power', 'setter': True, 'format': 'onoff'},
      },
  },