⬆️ Bump bootstrap from 4.0.0 to 4.3.1

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 4.0.0 to 4.3.1.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](twbs/bootstrap@v4.0.0...v4.3.1)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -18,7 +18,7 @@
         "url": ""
     },
     "dependencies": {
-        "bootstrap": "4.0.0"
+        "bootstrap": "4.3.1"
     },
     "devDependencies": {
         "browser-sync": "2.23.6",

package.json

@@ -282,9 +282,9 @@ [email protected]:
   dependencies:
     hoek "2.x.x"
 
-bootstrap@4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-4.0.0.tgz#ceb03842c145fcc1b9b4e15da2a05656ba68469a"
+bootstrap@4.3.1:
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/bootstrap/-/bootstrap-4.3.1.tgz#280ca8f610504d99d7b6b4bfc4b68cec601704ac"
 
 brace-expansion@^1.0.0, brace-expansion@^1.1.7:
   version "1.1.11"