fix(docs): Update links to Bootstrap V4.2 (#2370)

docs/markdown/intro/README.md

@@ -85,11 +85,10 @@ and Bootstrap-Vue SCSS in your project's custom SCSS file:
 // custom overrides go first
 $grid-breakpoints: (
   xs: 0,
-  sm: 576px,
-  md: 768px,
+  sm: 480px,
+  md: 640px,
   lg: 992px,
-  xl: 1200px
-  foo: 1999px
+  xl: 1300px
 );
 
 // then include the following
@@ -307,7 +306,7 @@ If you've already been using Bootstrap 4, there are a couple adjustments you may
 
 ### CSS
 BootstrapVue is to be used with Bootstrap 4 CSS/SCSS.
-Please see [Browsers and devices](https://getbootstrap.com/docs/4.1/getting-started/browsers-devices)
+Please see [Browsers and devices](https://getbootstrap.com/docs/4.2/getting-started/browsers-devices)
 for more information about browsers currently supported by Bootstrap 4.
 
 ### JS

docs/markdown/reference/theming/README.md

@@ -68,5 +68,5 @@ npm install --save-dev node-sass sass-loader
 
 ## See also
 For more details on theming Bootstrap's CSS, refer to the
-[**Official Bootstrap V4 Theming Documentation**](http://getbootstrap.com/docs/4.1/getting-started/theming/).
+[**Official Bootstrap V4 Theming Documentation**](http://getbootstrap.com/docs/4.2/getting-started/theming/).
 

docs/markdown/reference/utility-classes/README.md

@@ -4,19 +4,19 @@
 text alignment, floating, position, responsive display/hiding and much more.
 
 ## External references
-The following are convenience links to Bootstrap V4's documentation:
+The following are convenience links to Bootstrap V4.2's documentation:
 
-- <a href="https://getbootstrap.com/docs/4.1/utilities/borders/" target="_blank">Border utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/clearfix/" target="_blank">Clearfix utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/colors/" target="_blank">Color utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/display/" target="_blank">Display utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/flex/" target="_blank">Flex utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/float/" target="_blank">Float utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/image-replacement/" target="_blank">Image replacement utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/position/" target="_blank">Position utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/screenreaders/" target="_blank">Screen reader utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/sizing/" target="_blank">Sizing utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/spacing/" target="_blank">Spacing utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/text/" target="_blank">Text utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/vertical-align/" target="_blank">Vertical align utilities</a>
-- <a href="https://getbootstrap.com/docs/4.1/utilities/visibility/" target="_blank">Visibility utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/borders/" target="_blank">Border utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/clearfix/" target="_blank">Clearfix utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/colors/" target="_blank">Color utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/display/" target="_blank">Display utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/flex/" target="_blank">Flex utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/float/" target="_blank">Float utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/image-replacement/" target="_blank">Image replacement utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/position/" target="_blank">Position utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/screenreaders/" target="_blank">Screen reader utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/sizing/" target="_blank">Sizing utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/spacing/" target="_blank">Spacing utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/text/" target="_blank">Text utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/vertical-align/" target="_blank">Vertical align utilities</a>
+- <a href="https://getbootstrap.com/docs/4.2/utilities/visibility/" target="_blank">Visibility utilities</a>

src/components/form/README.md

@@ -206,7 +206,7 @@ on `<b-form>`.
 Set the `validated` prop, on `<b-form>`, to `true` to add the Bootstrap V4 `.was-validated` class
 to the form to trigger validation states
 
-Refer to the [Bootstrap V4 Form Validation Documentation](https://getbootstrap.com/docs/4.1/components/forms/#validation)
+Refer to the [Bootstrap V4 Form Validation Documentation](https://getbootstrap.com/docs/4.2/components/forms/#validation)
 for details on the new Bootstrap V4 validation states.
 
 ### Validation mechanisms
@@ -215,7 +215,7 @@ Documentation and examples (hopefully) coming soon.
 
 Please see the following references:
 
-- [Bootstrap V4: Form Validation Documentation](https://getbootstrap.com/docs/4.0/components/forms/#validation)
+- [Bootstrap V4: Form Validation Documentation](https://getbootstrap.com/docs/4.2/components/forms/#validation)
 - [MDN: Learn Form Validation - Using JavaScript API](https://developer.mozilla.org/en-US/docs/Learn/HTML/Forms/Form_validation#Validating_forms_using_JavaScript)
 - [MDN: HTML5 Constraint Validation](https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/HTML5/Constraint_validation)
 - [MDN: Validity State API](https://developer.mozilla.org/en-US/docs/Web/API/ValidityState)