⬆️ Bump bootstrap-vue from 2.1.0 to 2.4.0

Bumps [bootstrap-vue](https://github.com/bootstrap-vue/bootstrap-vue) from 2.1.0 to 2.4.0.
- [Release notes](https://github.com/bootstrap-vue/bootstrap-vue/releases)
- [Changelog](https://github.com/bootstrap-vue/bootstrap-vue/blob/dev/CHANGELOG.md)
- [Commits](bootstrap-vue/bootstrap-vue@v2.1.0...v2.4.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

pom.xml

@@ -116,7 +116,7 @@
         <dependency>
             <groupId>org.webjars.npm</groupId>
             <artifactId>bootstrap-vue</artifactId>
-            <version>2.1.0</version>
+            <version>2.4.0</version>
             <exclusions>
                 <exclusion>
                     <groupId>*</groupId>