Bump devise from 3.5.10 to 4.8.0

Bumps [devise](https://github.com/plataformatec/devise) from 3.5.10 to 4.8.0.
- [Release notes](https://github.com/plataformatec/devise/releases)
- [Changelog](https://github.com/heartcombo/devise/blob/master/CHANGELOG.md)
- [Commits](heartcombo/devise@v3.5.10...v4.8.0)

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

Gemfile.lock

@@ -92,7 +92,7 @@ GEM
     autoprefixer-rails (5.2.1.3)
       execjs
       json
-    bcrypt (3.1.12)
+    bcrypt (3.1.16)
     bootstrap-sass (3.4.1)
       autoprefixer-rails (>= 5.2.1)
       sassc (>= 2.0.0)
@@ -115,12 +115,11 @@ GEM
     crass (1.0.6)
     creole (0.5.0)
     daemons (1.2.2)
-    devise (3.5.10)
+    devise (4.8.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
-      railties (>= 3.2.6, < 5)
+      railties (>= 4.1.0)
       responders
-      thread_safe (~> 0.1)
       warden (~> 1.2.3)
     diff-display (0.0.1)
     diff-lcs (1.3)
@@ -222,7 +221,7 @@ GEM
       kaminari-core (= 1.2.1)
     kaminari-core (1.2.1)
     key_struct (0.4.2)
-    loofah (2.9.0)
+    loofah (2.9.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
@@ -295,7 +294,7 @@ GEM
       bundler (>= 1.3.0, < 2.0)
       railties (= 4.2.11.3)
       sprockets-rails
-    rails-deprecated_sanitizer (1.0.3)
+    rails-deprecated_sanitizer (1.0.4)
       activesupport (>= 4.2.0.alpha)
     rails-dom-testing (1.0.9)
       activesupport (>= 4.2.0, < 5.0)