Fix linter

Author: martijnrusschen

.stylelintrc.json

@@ -17,7 +17,6 @@
     "property-no-vendor-prefix": null,
     "alpha-value-notation": null,
     "color-function-notation": null,
-    "color-function-alias-notation": null,
     "selector-pseudo-class-no-unknown": [
       true,
       {

src/stylesheets/datepicker.scss

@@ -694,7 +694,7 @@ h2.react-datepicker__current-month {
   position: fixed;
   width: 100vw;
   height: 100vh;
-  background-color: rgba(0, 0, 0, 0.8);
+  background-color: rgb(0, 0, 0, 0.8);
   left: 0;
   top: 0;
   justify-content: center;