Update Bootstrap library from 4.5.2 to 4.5.3

gulp compile

rajab@vardot-dev:/var/www/html/products/vartheme_bs4$ gulp compile
[19:54:39] Using gulpfile /var/www/html/products/vartheme_bs4/gulpfile.js
[19:54:39] Starting 'compile'...
[19:54:43] Finished 'compile' after 3.66 s

rajab@vardot-dev:/var/www/html/products/vartheme_bs4/VARTHEME_BS4_SUBTHEME$ gulp compile
[19:54:47] Using gulpfile /var/www/html/products/vartheme_bs4/VARTHEME_BS4_SUBTHEME/gulpfile.js
[19:54:47] Starting 'compile'...
[19:54:51] Finished 'compile' after 3.46 s

yarn phpcs

rajab@vardot-dev:/var/www/html/products/vartheme_bs4$ yarn phpcs
yarn run v1.22.5
$ phpcs --standard=./.phpcs.xml .
Done in 5.07s.

yarn phpcbf

rajab@vardot-dev:/var/www/html/products/vartheme_bs4$ yarn phpcbf
yarn run v1.22.5
$ phpcbf --standard=./.phpcs.xml .
<code>
No fixable errors were found

Time: 4.88 secs; Memory: 94.01MB

Done in 4.97s.

yarn eslint

rajab@vardot-dev:/var/www/html/products/vartheme_bs4$ yarn eslint
yarn run v1.22.5
$ node ./node_modules/eslint/bin/eslint.js --config=.eslintrc.json .
Warning: React version was set to "detect" in eslint-plugin-react settings, but the "react" package is not installed. Assuming latest React version for linting.
Done in 1.82s.

yarn stylelint

rajab@vardot-dev:/var/www/html/products/vartheme_bs4$ yarn stylelint
yarn run v1.22.5
$ npx stylelint --config=.stylelintrc.json .

css/base/bootstrap.base.css
 11780:3  ✖  Expected empty line before at-rule                  at-rule-empty-line-before
 11783:3  ✖  Expected rule to come before at-rule with a block   order/order              

VARTHEME_BS4_SUBTHEME/css/base/bootstrap.base.css
 11780:3  ✖  Expected empty line before at-rule                  at-rule-empty-line-before
 11783:3  ✖  Expected rule to come before at-rule with a block   order/order

error Command failed with exit code 2.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.