Add support for LTR390 (#1505)

* Add support for ltr390

* Fix linting errors

* Fix more linting errors

* Linting fixes continued

* Linting forever

* Another one

* Fix regression and linting

* Fix narrowing conversion

* Add test and bugfix

* Add codeowners

* Update CODEOWNERS

* Update sensor defs

* Reformatted with black

* Fixed device class import

* Update CODEOWNERS

* Update CODEOWNERS

* Adding all config options

As requested https://github.com/esphome/esphome/pull/1505#discussion_r597326897

* Moving test to different config file

test1.yml runs out of memory

* Update according to comments

* Add safety clause to reading modes

* Fix clang-tidy complaint

* Revert change to i2c component

* Fix for changes in dev

* Revert "Revert change to i2c component"

This reverts commit 2810df59e9.

Co-authored-by: Otto winter <otto@otto-winter.com>
Co-authored-by: Oxan van Leeuwen <oxan@oxanvanleeuwen.nl>

CODEOWNERS

@@ -74,6 +74,7 @@ esphome/components/json/* @OttoWinter
 esphome/components/ledc/* @OttoWinter
 esphome/components/light/* @esphome/core
 esphome/components/logger/* @esphome/core
+esphome/components/ltr390/* @sjtrny
 esphome/components/max7219digit/* @rspaargaren
 esphome/components/mcp23008/* @jesserockz
 esphome/components/mcp23017/* @jesserockz