Fix BME680 Bugs

@chris007, there were some things I overlooked when reviewing your MR. Fixed them myself, please take a look at the commits to see what was missing. Sorry!

changed milestone to %v1.4

added 1-Bug 3-Module labels

added 2 commits

• d45a6676 - fix(bme680): Lock I2C bus when accessing it
• 6bf49419 - fix(bme680): Return None instead of NULL

Compare with previous version

Looks good to me! Thanks for keeping our codebase clean.

However, I'm only a bot - so a human will still have to approve this request.

added 9 commits

• 6bf49419...e08ab5df - 5 commits from branch master
• 772d1fd9 - fix(bme680): Deinit only after initialization
• 82b02fa1 - chore(bme680): Minor style fixes
• 5e587a92 - fix(bme680): Lock I2C bus when accessing it
• 28775e18 - fix(bme680): Return None instead of NULL

Compare with previous version

merged

mentioned in commit 76acf664