Fix Sass division deprecation warning

[richardwestenra]

I am getting console warnings (copied below) when importing this project's SCSS file into my next.js project.

Sass currently treats / as a division operation in some contexts and a separator in others. This makes it difficult for Sass users to tell what any given / will mean, and makes it hard to work with new CSS features that use / as a separator.

Sass docs

I've made these changes to hopefully remove this deprecated feature and fix these warnings.

DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.

Recommendation: math.div(12, $mon-pad-cols)

More info and automated migrator: https://sass-lang.com/d/slash-div

   ╷
93 │     $mon-pad-rows: round(12 / $mon-pad-cols);
   │                          ^^^^^^^^^^^^^^^^^^
   ╵
    node_modules/react-month-picker/scss/month-picker.scss 93:26  root stylesheet

DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.

Recommendation: math.div(100%, $mon-pad-cols)

More info and automated migrator: https://sass-lang.com/d/slash-div

   ╷
94 │     $mon-option-width: 100% / $mon-pad-cols;
   │                        ^^^^^^^^^^^^^^^^^^^^
   ╵
    node_modules/react-month-picker/scss/month-picker.scss 94:24  root stylesheet

DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.

Recommendation: math.div(12, $m-mon-pad-cols)

More info and automated migrator: https://sass-lang.com/d/slash-div

   ╷
96 │     $m-mon-pad-rows: round(12 / $m-mon-pad-cols);
   │                            ^^^^^^^^^^^^^^^^^^^^
   ╵
    node_modules/react-month-picker/scss/month-picker.scss 96:28  root stylesheet

DEPRECATION WARNING: Using / for division is deprecated and will be removed in Dart Sass 2.0.0.

Recommendation: math.div(100%, $m-mon-pad-cols)

More info and automated migrator: https://sass-lang.com/d/slash-div

   ╷
97 │     $m-mon-option-width: 100% / $m-mon-pad-cols;
   │                          ^^^^^^^^^^^^^^^^^^^^^^
   ╵
    node_modules/react-month-picker/scss/month-picker.scss 97:26  root stylesheet

[richardwestenra]

@nickeljew Hey are you still maintaining this repo? Do you want/need help?