Bump dotenv-rails from 2.4.0 to 2.5.0

Bumps [dotenv-rails](https://github.com/bkeepers/dotenv) from 2.4.0 to 2.5.0.
- [Release notes](https://github.com/bkeepers/dotenv/releases)
- [Changelog](https://github.com/bkeepers/dotenv/blob/master/Changelog.md)
- [Commits](bkeepers/dotenv@v2.4.0...v2.5.0)

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

Gemfile.lock

@@ -99,9 +99,9 @@ GEM
       unf (>= 0.0.5, < 1.0.0)
     doorkeeper (4.3.2)
       railties (>= 4.2)
-    dotenv (2.4.0)
-    dotenv-rails (2.4.0)
-      dotenv (= 2.4.0)
+    dotenv (2.5.0)
+    dotenv-rails (2.5.0)
+      dotenv (= 2.5.0)
       railties (>= 3.2, < 6.0)
     erubi (1.7.1)
     exception_notification (4.2.2)
@@ -192,7 +192,7 @@ GEM
     multipart-post (2.0.0)
     netrc (0.11.0)
     nio4r (2.3.0)
-    nokogiri (1.8.2)
+    nokogiri (1.8.3)
       mini_portile2 (~> 2.3.0)
     oauth (0.5.4)
     oauth2 (1.4.0)