Upgrade speedtest-cli to 1.0.7

[fabaff]

Description:

• Changelog: https://github.com/sivel/speedtest-cli/commits/master

Example entry for configuration.yaml (if applicable):

sensor:
  - platform: speedtest
    monitored_conditions:
      - ping
      - download
      - upload

2017-10-20 11:42:18 INFO (MainThread) [homeassistant.core] Bus:Handling <Event call_service[L]: domain=sensor, service=update_speedtest, service_data=, service_call_id=140094955823904-9>
2017-10-20 11:42:18 INFO (SyncWorker_3) [homeassistant.components.sensor.speedtest] Executing speedtest...
[...]
2017-10-20 11:42:41 INFO (MainThread) [homeassistant.core] Bus:Handling <Event service_executed[L]: service_call_id=140094955823904-9>
[...]
2017-10-20 11:42:52 INFO (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: entity_id=sensor.speedtest_upload, old_state=<state sensor.speedtest_upload=unknown; unit_of_measurement=Mbit/s, friendly_name=Speedtest Upload, icon=mdi:speedometer @ 2017-10-20T11:38:13.911623+02:00>, new_state=<state sensor.speedtest_upload=32.43; unit_of_measurement=Mbit/s, friendly_name=Speedtest Upload, icon=mdi:speedometer @ 2017-10-20T11:42:52.431330+02:00>>
2017-10-20 11:42:52 INFO (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: entity_id=sensor.speedtest_ping, old_state=<state sensor.speedtest_ping=unknown; unit_of_measurement=ms, friendly_name=Speedtest Ping, icon=mdi:speedometer @ 2017-10-20T11:38:13.910978+02:00>, new_state=<state sensor.speedtest_ping=31.4; unit_of_measurement=ms, friendly_name=Speedtest Ping, icon=mdi:speedometer @ 2017-10-20T11:42:52.447582+02:00>>
2017-10-20 11:42:52 INFO (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: entity_id=sensor.speedtest_download, old_state=<state sensor.speedtest_download=unknown; unit_of_measurement=Mbit/s, friendly_name=Speedtest Download, icon=mdi:speedometer @ 2017-10-20T11:38:13.911942+02:00>, new_state=<state sensor.speedtest_download=33.93; unit_of_measurement=Mbit/s, friendly_name=Speedtest Download, icon=mdi:speedometer @ 2017-10-20T11:42:52.452874+02:00>>

Checklist:

If the code communicates with devices, web services, or third-party tools:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• New dependencies have been added to the REQUIREMENTS variable ([example][ex-requir]).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.