Bump bootstrap from 5.1.0 to 5.1.3

Bumps [bootstrap](https://github.com/twbs/bootstrap-rubygem) from 5.1.0 to 5.1.3.
- [Release notes](https://github.com/twbs/bootstrap-rubygem/releases)
- [Changelog](https://github.com/twbs/bootstrap-rubygem/blob/master/CHANGELOG.md)
- [Commits](https://github.com/twbs/bootstrap-rubygem/compare/v5.1.0...v5.1.3)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -27,7 +27,7 @@ GEM
     babel-transpiler (0.7.0)
       babel-source (>= 4.0, < 6)
       execjs (~> 2.0)
-    bootstrap (5.1.0)
+    bootstrap (5.1.3)
       autoprefixer-rails (>= 9.1.0)
       popper_js (>= 2.9.3, < 3)
       sassc-rails (>= 2.0.0)
@@ -112,7 +112,7 @@ GEM
       forwardable-extended (~> 2.6)
     popper_js (2.9.3)
     public_suffix (4.0.6)
-    racc (1.5.2)
+    racc (1.6.0)
     rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
@@ -154,9 +154,9 @@ GEM
       babel-source (>= 5.8.11)
       babel-transpiler
       sprockets (>= 3.0.0)
-    sprockets-rails (3.2.2)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
+    sprockets-rails (3.4.1)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
       sprockets (>= 3.0.0)
     thor (1.1.0)
     thread_safe (0.3.6)