Fix the issue reported by phpcs

Problem/Motivation

Getting following error/warnings:

FILE: D:\xampp\htdocs\project_10\web\modules\contrib\daterangepickerwidget\src\DateRangePickerHelper.php
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FOUND 9 ERRORS AND 1 WARNING AFFECTING 10 LINES
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13 | ERROR | Description for the @return value is missing
16 | ERROR | Inline doc block comments are not allowed; use "/* Comment */" or "// Comment" instead
33 | ERROR | Description for the @return value is missing
52 | ERROR | Missing parameter comment
53 | ERROR | Missing parameter comment
94 | ERROR | Doc comment is empty
109 | WARNING | Line exceeds 80 characters; contains 90 characters
111 | ERROR | Missing parameter comment
112 | ERROR | Missing parameter comment
121 | ERROR | Doc comment is empty
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FILE: D:\xampp\htdocs\project_10\web\modules\contrib\daterangepickerwidget\src\Element\DateRangePickerElement.php
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FOUND 4 ERRORS AND 3 WARNINGS AFFECTING 7 LINES
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11 | WARNING | Line exceeds 80 characters; contains 89 characters
40 | ERROR | Doc comment is empty
50 | WARNING | Line exceeds 80 characters; contains 107 characters
71 | ERROR | The array declaration extends to column 125 (the limit is 80). The array content should be split up over multiple lines
75 | WARNING | Line exceeds 80 characters; contains 110 characters
82 | ERROR | Doc comment is empty
106 | ERROR | Doc comment is empty
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FILE: D:\xampp\htdocs\project_10\web\modules\contrib\daterangepickerwidget\src\Plugin\better_exposed_filters\filter\DateRangePickerFilter.php
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FOUND 2 ERRORS AND 2 WARNINGS AFFECTING 4 LINES
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25 | ERROR | The array declaration extends to column 179 (the limit is 80). The array content should be split up over multiple lines
42 | WARNING | Unused variable $element.
69 | WARNING | Line exceeds 80 characters; contains 113 characters
116 | ERROR | Doc comment is empty
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FILE: D:\xampp\htdocs\project_10\web\modules\contrib\daterangepickerwidget\src\Plugin\Field\FieldFormatter\DateRangePickerDefaultFormatter.php
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FOUND 1 ERROR AND 1 WARNING AFFECTING 2 LINES
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12 | WARNING | Line exceeds 80 characters; contains 81 characters
24 | ERROR | Doc comment is empty
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FILE: D:\xampp\htdocs\project_10\web\modules\contrib\daterangepickerwidget\src\Plugin\Field\FieldWidget\DateRangePickerDefaultWidget.php
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FOUND 6 ERRORS AND 5 WARNINGS AFFECTING 8 LINES
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51 | WARNING | Line exceeds 80 characters; contains 81 characters
53 | WARNING | Line exceeds 80 characters; contains 100 characters
66 | ERROR | Comment indentation error, expected only 1 spaces
67 | WARNING | Line exceeds 80 characters; contains 98 characters
67 | ERROR | Comment indentation error, expected only 9 spaces
99 | ERROR | Comment indentation error, expected only 1 spaces
101 | WARNING | Line exceeds 80 characters; contains 141 characters
102 | WARNING | There must be no blank line following an inline comment
102 | ERROR | Comment indentation error, expected only 5 spaces
105 | ERROR | Doc comment short description must start with a capital letter
105 | ERROR | Doc comment short description must end with a full stop
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Steps to reproduce

Run following command:

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

Proposed resolution

Above error/warnings need to be fixed

Remaining tasks

User interface changes

API changes

Data model changes