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 2810df59e9c05311df6d32149ed79a393676503b.

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

tests/test2.yaml

@@ -238,6 +238,20 @@ sensor:
       name: 'Inkbird IBS-TH1 Humidity'
     battery_level:
       name: 'Inkbird IBS-TH1 Battery Level'
+  - platform: ltr390
+    uv:
+      name: "LTR390 UV"
+    uv_index:
+      name: "LTR390 UVI"
+    light:
+      name: "LTR390 Light"
+    ambient_light:
+      name: "LTR390 ALS"
+    gain: "X3"
+    resolution: 18
+    window_correction_factor: 1.0
+    address: 0x53
+    update_interval: 60s
   - platform: sgp40
     name: 'Workshop VOC'
     update_interval: 5s