Pull request: added companiesdb script, fix #2793

Merge in DNS/adguard-home from 2793-whotracksme to master

Squashed commit of the following:

commit eff9de98b389ba087eb529c12e3ec916842aa8c3
Merge: bf9bc6a4 49eb62ae
Author: Andrey Meshkov <am@adguard.com>
Date:   Wed Dec 15 16:38:53 2021 +0300

    Merge branch 'master' into 2793-whotracksme

commit bf9bc6a4f5c1d7e4b6265f1c33bd532ec5b58cc7
Author: Andrey Meshkov <am@adguard.com>
Date:   Wed Dec 15 16:04:57 2021 +0300

    scripts: fix review comments

commit 5a035cabc1a75a3c750a4a7a36af38ad9f33959b
Author: Andrey Meshkov <am@adguard.com>
Date:   Wed Dec 15 15:47:41 2021 +0300

    added companiesdb script, fix #2793

client/src/helpers/trackers/adguard.json

@@ -1,5 +1,5 @@
 {
-    "timeUpdated": "2018-10-14",
+    "timeUpdated": "2021-12-15",
     "categories": {
         "0": "audio_video_player",
         "1": "comments",
@@ -14,6 +14,7 @@
         "10": "hosting",
         "11": "unknown",
         "12": "extensions",
+        "13": "email",
         "101": "mobile_analytics"
     },
     "trackers": {