Coding standards and best practices

The module have some coding standards and best practices issues.

FILE: ...rd94\web\modules\slick_extras\slick_devel\js\slick.load.devel.js
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FOUND 3 ERRORS AFFECTING 3 LINES
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20 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected
| | "FALSE" but found "false"
212 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected
| | "FALSE" but found "false"
272 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected
| | "NULL" but found "null"
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PHPCBF CAN FIX THE 3 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: ...\modules\slick_extras\slick_example\js\slick_example.asnavfor.js
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FOUND 2 ERRORS AFFECTING 2 LINES
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14 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected
| | "TRUE" but found "true"
16 | ERROR | [x] TRUE, FALSE and NULL must be uppercase; expected
| | "TRUE" but found "true"
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PHPCBF CAN FIX THE 2 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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