Pull request: scripts: imp client linting

Merge in DNS/adguard-home from imp-hook to master

Squashed commit of the following:

commit f09a3ea2c0299b3ecb39b62d83b65919e425e591
Author: Ainar Garipov <A.Garipov@AdGuard.COM>
Date:   Thu Jan 28 13:49:03 2021 +0300

    scripts: imp client linting

scripts/hooks/pre-commit

@@ -2,11 +2,16 @@
 
 set -e -f -u
 
-if [ "$(git diff --cached --name-only -- '*.js')" ]
+if [ "$(git diff --cached --name-only -- 'client/*.js')" ]
 then
 	make js-lint js-test
 fi
 
+if [ "$(git diff --cached --name-only -- 'client2/*.js' 'client2/*.ts' 'client2/*.tsx')" ]
+then
+	make js-beta-lint js-beta-test
+fi
+
 if [ "$(git diff --cached --name-only -- '*.go' 'go.mod')" ]
 then
 	make go-lint go-test