Bump bootstrap to 4.3.1

style/bootstrap/_root.scss

@@ -1,19 +1,19 @@
-:root {
-  // Custom variable values only support SassScript inside `#{}`.
-  @each $color, $value in $colors {
-    --#{$color}: #{$value};
-  }
-
-  @each $color, $value in $theme-colors {
-    --#{$color}: #{$value};
-  }
-
-  @each $bp, $value in $grid-breakpoints {
-    --breakpoint-#{$bp}: #{$value};
-  }
-
-  // Use `inspect` for lists so that quoted items keep the quotes.
-  // See https://github.com/sass/sass/issues/2383#issuecomment-336349172
-  --font-family-sans-serif: #{inspect($font-family-sans-serif)};
-  --font-family-monospace: #{inspect($font-family-monospace)};
-}
+:root {
+  // Custom variable values only support SassScript inside `#{}`.
+  @each $color, $value in $colors {
+    --#{$color}: #{$value};
+  }
+
+  @each $color, $value in $theme-colors {
+    --#{$color}: #{$value};
+  }
+
+  @each $bp, $value in $grid-breakpoints {
+    --breakpoint-#{$bp}: #{$value};
+  }
+
+  // Use `inspect` for lists so that quoted items keep the quotes.
+  // See https://github.com/sass/sass/issues/2383#issuecomment-336349172
+  --font-family-sans-serif: #{inspect($font-family-sans-serif)};
+  --font-family-monospace: #{inspect($font-family-monospace)};
+}