Bump coveralls from 0.7.1 to 0.8.22

Bumps [coveralls](https://coveralls.io) from 0.7.1 to 0.8.22.

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

Gemfile.lock

@@ -44,15 +44,13 @@ GEM
     cocaine (0.5.8)
       climate_control (>= 0.0.3, < 1.0)
     concurrent-ruby (1.1.4)
-    coveralls (0.7.1)
-      multi_json (~> 1.3)
-      rest-client
-      simplecov (>= 0.7)
-      term-ansicolor
-      thor
+    coveralls (0.8.22)
+      json (>= 1.8, < 3)
+      simplecov (~> 0.16.1)
+      term-ansicolor (~> 1.3)
+      thor (~> 0.19.4)
+      tins (~> 1.6)
     docile (1.3.1)
-    domain_name (0.5.20180417)
-      unf (>= 0.0.5, < 1.0.0)
     erubis (2.7.0)
     execjs (2.7.0)
     ffi (1.10.0)
@@ -62,8 +60,6 @@ GEM
     geokit-rails (1.1.4)
       geokit (>= 1.5.0)
     hike (1.2.3)
-    http-cookie (1.0.3)
-      domain_name (~> 0.5)
     httparty (0.16.2)
       multi_xml (>= 0.5.2)
     i18n (0.9.5)
@@ -85,7 +81,6 @@ GEM
     multi_json (1.13.1)
     multi_xml (0.6.0)
     mysql2 (0.3.21)
-    netrc (0.11.0)
     nokogiri (1.10.1)
       mini_portile2 (~> 2.4.0)
     oa-core (0.3.2)
@@ -140,10 +135,6 @@ GEM
     recaptcha (4.13.2)
       json
     ref (2.0.0)
-    rest-client (2.0.2)
-      http-cookie (>= 1.0.2, < 2.0)
-      mime-types (>= 1.16, < 4.0)
-      netrc (~> 0.8)
     right_aws (3.1.0)
       right_http_connection (>= 1.2.5)
     right_http_connection (1.5.0)
@@ -173,7 +164,7 @@ GEM
     therubyracer (0.12.3)
       libv8 (~> 3.16.14.15)
       ref
-    thor (0.20.3)
+    thor (0.19.4)
     tilt (1.4.1)
     tins (1.20.2)
     treetop (1.4.15)
@@ -182,9 +173,6 @@ GEM
     tzinfo (0.3.55)
     uglifier (4.1.20)
       execjs (>= 0.3.0, < 3)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.7.5)
     uuidtools (2.1.5)
     will_paginate (3.1.7)
     will_paginate-bootstrap (1.0.2)