bme280: improve config support

[kenbell]

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This breaks back compat by adding a parameter to the "Config" method, inline with other devices.

The extra config allows the device to be used in 'Forced' mode for more power-efficient use-cases.

[deadprogram]

Perhaps this could be added as ConfigureWithSettings(config Config) to avoid a breaking change?

[deadprogram]

Thank you very much for making my requested changes @kenbell now merging!

[deadprogram]

Let's merge and continue from there. Thanks @kenbell