Bump bcrypt from 3.1.19 to 3.1.20

Bumps [bcrypt](https://github.com/codahale/bcrypt-ruby) from 3.1.19 to 3.1.20.
- [Release notes](https://github.com/codahale/bcrypt-ruby/releases)
- [Changelog](https://github.com/bcrypt-ruby/bcrypt-ruby/blob/master/CHANGELOG)
- [Commits](https://github.com/codahale/bcrypt-ruby/compare/v3.1.19...v3.1.20)

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

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

Gemfile.lock

@@ -72,7 +72,7 @@ GEM
     autoprefixer-rails (10.4.7.0)
       execjs (~> 2)
     backport (1.2.0)
-    bcrypt (3.1.19)
+    bcrypt (3.1.20)
     benchmark (0.2.1)
     better_html (2.0.2)
       actionview (>= 6.0)
@@ -354,7 +354,7 @@ DEPENDENCIES
   actionpack-xml_parser (~> 2.0)
   activemodel-serializers-xml (~> 1.0.1)
   acts_as_list
-  bcrypt (~> 3.1.19)
+  bcrypt (~> 3.1.20)
   bootstrap-sass (= 3.4.1)
   bullet
   byebug