Fix the circle builds (#20)

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: git://github.com/rails/rails.git
-  revision: 88fe8d9e7ca687f4253090bcc2c634595a19d203
+  revision: 4a2746db1c92d0bf246e938b872b233a64f0a18b
   specs:
     actioncable (6.1.0.alpha)
       actionpack (= 6.1.0.alpha)
@@ -81,11 +81,11 @@ GIT
 
 GIT
   remote: https://github.com/lynndylanhurley/devise_token_auth
-  revision: 2c3a8d83304062523899764ae695d8e5bdc74269
+  revision: b6915aa1bd12e28236ef6e9821a29fba5c5039d2
   specs:
     devise_token_auth (1.1.1)
       bcrypt (~> 3.0)
-      devise (> 3.5.2, < 4.7)
+      devise (> 3.5.2, < 5)
       rails (>= 4.2.0, < 6.1)
 
 GIT
@@ -97,9 +97,9 @@ GIT
 
 GIT
   remote: https://github.com/plataformatec/devise
-  revision: 12fc5b76d89cf6e9c47289416fb24bf1a85f03da
+  revision: 6bb74c5abff9f75e992560b308b1f8ae926da50e
   specs:
-    devise (4.6.2)
+    devise (4.7.0)
       bcrypt (~> 3.0)
       orm_adapter (~> 0.1)
       railties (>= 4.1.0)
@@ -113,8 +113,8 @@ GEM
       public_suffix (>= 2.0.2, < 4.0)
     ast (2.4.0)
     aws-eventstream (1.0.3)
-    aws-partitions (1.203.0)
-    aws-sdk-core (3.63.0)
+    aws-partitions (1.206.0)
+    aws-sdk-core (3.64.0)
       aws-eventstream (~> 1.0, >= 1.0.2)
       aws-partitions (~> 1.0)
       aws-sigv4 (~> 1.1)
@@ -193,6 +193,7 @@ GEM
     globalid (0.4.2)
       activesupport (>= 4.2.0)
     hashie (3.6.0)
+    http-accept (1.7.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
     httparty (0.17.0)
@@ -297,7 +298,7 @@ GEM
     rack-cache (1.9.0)
       rack (>= 0.4)
     rack-cors (1.0.3)
-    rack-protection (2.0.5)
+    rack-protection (2.0.7)
       rack
     rack-proxy (0.6.5)
       rack
@@ -326,7 +327,8 @@ GEM
     responders (3.0.0)
       actionpack (>= 5.0)
       railties (>= 5.0)
-    rest-client (2.0.2)
+    rest-client (2.1.0)
+      http-accept (>= 1.7.0, < 2.0)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 4.0)
       netrc (~> 0.8)
@@ -493,7 +495,7 @@ DEPENDENCIES
   wisper (= 2.0.0)
 
 RUBY VERSION
-   ruby 2.6.0p0
+   ruby 2.6.3p62
 
 BUNDLED WITH
    1.17.3