Fix the issues reported by phpcs

Problem/Motivation

Fix issue reported by PHPCS

Steps to reproduce

vendor/bin/phpcs --standard=Drupal,DrupalPractice --extensions=php,module,inc,install,test,profile,theme,css,info,txt,md,yml,php  /social_search_autocomplete/

FILE: /contrib/social_search_autocomplete/README.md
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FOUND 1 ERROR AND 2 WARNINGS AFFECTING 3 LINES
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 13 | WARNING | [ ] Line exceeds 80 characters; contains 212 characters
 14 | WARNING | [ ] Line exceeds 80 characters; contains 173 characters
 37 | 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: /social_search_autocomplete/social_search_autocomplete.install
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FOUND 2 ERRORS AFFECTING 2 LINES
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  1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
 35 | ERROR | [x] Doc comment short description must end with a full stop
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PHPCBF CAN FIX THE 2 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /social_search_autocomplete/config/update/social_search_autocomplete_update_8002.yml
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FOUND 1 ERROR AFFECTING 1 LINE
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 27 | 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: /social_search_autocomplete/social_search_autocomplete.module
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /social_search_autocomplete/social_search_autocomplete.post_update.php
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FOUND 1 ERROR AFFECTING 1 LINE
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 1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
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PHPCBF CAN FIX THE 1 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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FILE: /social_search_autocomplete/css/search-suggestion.css
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FOUND 8 ERRORS AFFECTING 8 LINES
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  1 | ERROR | [x] End of line character is invalid; expected "\n" but found "\r\n"
  5 | ERROR | [x] Blank lines are not allowed in class definitions
  7 | ERROR | [x] Blank lines are not allowed in class definitions
 16 | ERROR | [x] Blank lines are not allowed in class definitions
 27 | ERROR | [x] Blank lines are not allowed in class definitions
 30 | ERROR | [x] Blank lines are not allowed in class definitions
 34 | ERROR | [x] CSS colours must be defined in lowercase; expected #9b9b9b but found #9B9B9B
 40 | ERROR | [x] Blank lines are not allowed in class definitions
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PHPCBF CAN FIX THE 8 MARKED SNIFF VIOLATIONS AUTOMATICALLY
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