Bump omniauth-oauth2 from 1.1.0 to 1.5.0

Bumps [omniauth-oauth2](https://github.com/omniauth/omniauth-oauth2) from 1.1.0 to 1.5.0.
- [Release notes](https://github.com/omniauth/omniauth-oauth2/releases)
- [Commits](omniauth/omniauth-oauth2@v1.1.0...v1.5.0)

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

Gemfile.lock

@@ -90,8 +90,8 @@ GEM
       multi_json (~> 1.0)
     factory_girl (4.0.0)
       activesupport (>= 3.0.0)
-    faraday (0.8.4)
-      multipart-post (~> 1.1)
+    faraday (0.17.0)
+      multipart-post (>= 1.2, < 3)
     ffi (1.4.0)
     gherkin (2.11.2)
       json (>= 1.4.6)
@@ -111,20 +111,18 @@ GEM
       guard (>= 1.1)
     guard-shell (0.5.1)
       guard (>= 1.1.0)
-    hashie (1.2.0)
+    hashie (3.6.0)
     headless (0.3.1)
     highline (1.6.15)
     hike (1.2.3)
-    httpauth (0.1)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     journey (1.0.4)
     jquery-rails (2.1.1)
       railties (>= 3.1.0, < 5.0)
       thor (~> 0.14)
     json (2.2.0)
-    jwt (0.1.5)
-      multi_json (>= 1.0)
+    jwt (2.2.1)
     kaminari (0.13.0)
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
@@ -141,8 +139,9 @@ GEM
       treetop (~> 1.4.8)
     mime (0.1)
     mime-types (1.25.1)
-    multi_json (1.14.0)
-    multipart-post (1.1.5)
+    multi_json (1.14.1)
+    multi_xml (0.6.0)
+    multipart-post (2.1.1)
     net-scp (1.1.0)
       net-ssh (>= 2.6.5)
     net-sftp (2.1.1)
@@ -152,24 +151,24 @@ GEM
       net-ssh (>= 2.6.5)
     nokogiri (1.5.5)
     oauth (0.4.6)
-    oauth2 (0.8.0)
-      faraday (~> 0.8)
-      httpauth (~> 0.1)
-      jwt (~> 0.1.4)
-      multi_json (~> 1.0)
-      rack (~> 1.2)
-    omniauth (1.1.0)
-      hashie (~> 1.2)
-      rack
+    oauth2 (1.4.2)
+      faraday (>= 0.8, < 2.0)
+      jwt (>= 1.0, < 3.0)
+      multi_json (~> 1.3)
+      multi_xml (~> 0.5)
+      rack (>= 1.2, < 3)
+    omniauth (1.4.2)
+      hashie (>= 1.2, < 4)
+      rack (>= 1.0, < 3)
     omniauth-github (1.0.2)
       omniauth (~> 1.0)
       omniauth-oauth2 (~> 1.1)
     omniauth-oauth (1.0.1)
       oauth
       omniauth (~> 1.0)
-    omniauth-oauth2 (1.1.0)
-      oauth2 (~> 0.8.0)
-      omniauth (~> 1.0)
+    omniauth-oauth2 (1.5.0)
+      oauth2 (~> 1.1)
+      omniauth (~> 1.2)
     omniauth-twitter (0.0.12)
       multi_json (~> 1.3)
       omniauth-oauth (~> 1.0)