added default flag to all variable declarations

package.json

@@ -1,7 +1,7 @@
 {
     "name": "@typedbootstrap/admin-styles",
     "description": "A collection of styles for admin interfaces based off SB Admin, an open source admin dashboard template for Bootstrap created by Start Bootstrap",
-    "version": "1.0.0",
+    "version": "1.1.0",
     "license": "MIT",
     "scripts": {
         "build": "rimraf dist/ && sass ./src/scss/styles.scss ./dist/css/styles.css --no-source-map && sass ./src/scss/styles.scss ./dist/css/styles.min.css --no-source-map --style compressed",

src/scss/_variables.scss

@@ -5,31 +5,31 @@
 @import '../../node_modules/bootstrap/scss/variables';
 
 // Content
-$content-zindex: 1037 !default;
+$content-zindex: 1037   !default;
 
 // Sidenav
-$sidenav-base-width: 225px;
-$sidenav-zindex: 1038 !default;
+$sidenav-base-width: 225px  !default;
+$sidenav-zindex: 1038       !default;
 
-$sidenav-dark-bg: $gray-900;
-$sidenav-dark-color: fade-out($white, .5);
-$sidenav-dark-heading-color: fade-out($white, .75);
-$sidenav-dark-link-color: fade-out($white, .5);
-$sidenav-dark-link-active-color: $white;
-$sidenav-dark-icon-color: fade-out($white, .75);
-$sidenav-dark-footer-bg: $gray-800;
+$sidenav-dark-bg: $gray-900                         !default;
+$sidenav-dark-color: fade-out($white, .5)           !default;
+$sidenav-dark-heading-color: fade-out($white, .75)  !default;
+$sidenav-dark-link-color: fade-out($white, .5)      !default;
+$sidenav-dark-link-active-color: $white             !default;
+$sidenav-dark-icon-color: fade-out($white, .75)     !default;
+$sidenav-dark-footer-bg: $gray-800                  !default;
 
-$sidenav-light-bg: $gray-100;
-$sidenav-light-color: $gray-900;
-$sidenav-light-heading-color: $gray-500;
-$sidenav-light-link-color: $sidenav-light-color;
-$sidenav-light-link-active-color: $primary;
-$sidenav-light-icon-color: $gray-500;
-$sidenav-light-footer-bg: $gray-200;
+$sidenav-light-bg: $gray-100                    !default;
+$sidenav-light-color: $gray-900                 !default;
+$sidenav-light-heading-color: $gray-500         !default;
+$sidenav-light-link-color: $sidenav-light-color !default;
+$sidenav-light-link-active-color: $primary      !default;
+$sidenav-light-icon-color: $gray-500            !default;
+$sidenav-light-footer-bg: $gray-200             !default;
 
 // Topnav
-$topnav-base-height: 56px;
-$topnav-zindex: 1039 !default;
+$topnav-base-height: 56px   !default;
+$topnav-zindex: 1039        !default;
 
-$topnav-dark-toggler-color: fade-out($white, .5);
-$topnav-light-toggler-color: $gray-900;
+$topnav-dark-toggler-color: fade-out($white, .5)    !default;
+$topnav-light-toggler-color: $gray-900              !default;