Bump attr_encrypted from 3.1.0 to 4.0.0

Bumps [attr_encrypted](https://github.com/attr-encrypted/attr_encrypted) from 3.1.0 to 4.0.0.
- [Release notes](https://github.com/attr-encrypted/attr_encrypted/releases)
- [Changelog](https://github.com/attr-encrypted/attr_encrypted/blob/master/CHANGELOG.md)
- [Commits](attr-encrypted/attr_encrypted@3.1.0...v4.0.0)

---
updated-dependencies:
- dependency-name: attr_encrypted
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Gemfile

@@ -19,7 +19,7 @@ gem 'faraday_middleware', '~> 1.0'
 # Cache HTTP responses
 gem 'faraday-http-cache', '~> 2.5'
 # Generates attr_accessors that encrypt and decrypt attributes transparently
-gem 'attr_encrypted', '~> 3.1'
+gem 'attr_encrypted', '~> 4.0'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console

Gemfile.lock

@@ -71,7 +71,7 @@ GEM
       sassc-rails (~> 2.1)
       selectize-rails (~> 0.6)
     ast (2.4.2)
-    attr_encrypted (3.1.0)
+    attr_encrypted (4.0.0)
       encryptor (~> 3.0.0)
     base64 (0.2.0)
     bindex (0.8.1)
@@ -294,7 +294,7 @@ PLATFORMS
 
 DEPENDENCIES
   administrate (~> 0.20)
-  attr_encrypted (~> 3.1)
+  attr_encrypted (~> 4.0)
   brakeman
   byebug
   database_cleaner