Fix Coding Standards

Problem/Motivation

Run phpcs against the module code to find the following errors:

FILE: ...ontrib_Envs/Modules/web/modules/contrib/iframe_video/iframe_video.info.yml
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FOUND 1 ERROR AND 3 WARNINGS AFFECTING 3 LINES
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 7 | WARNING | [ ] All dependencies must be prefixed with the project name, for
   |         |     example "drupal:"
 8 | WARNING | [ ] All dependencies must be prefixed with the project name, for
   |         |     example "drupal:"
 9 | WARNING | [ ] All dependencies must be prefixed with the project name, for
   |         |     example "drupal:"
 9 | ERROR   | [x] Expected 1 newline at end of file; 0 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: ...s/web/modules/contrib/iframe_video/src/Plugin/media/Source/IframeVideo.php
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FOUND 3 ERRORS AND 2 WARNINGS AFFECTING 4 LINES
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  5 | WARNING | [x] Unused use statement
  6 | WARNING | [x] Unused use statement
 20 | ERROR   | [x] Additional blank lines found at end of doc comment
 24 | ERROR   | [x] Missing function doc comment
 24 | ERROR   | [x] Expected 1 blank line before function; 2 found
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PHPCBF CAN FIX THE 5 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: .../Contrib_Envs/Modules/web/modules/contrib/iframe_video/iframe_video.module
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FOUND 1 ERROR AFFECTING 1 LINE
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 32 | ERROR | [x] Expected 1 newline at end of file; 2 found
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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Time: 85ms; Memory: 10MB

Steps to reproduce

Run phpcs