Upgrade sentry-raven gem

Gemfile

@@ -61,7 +61,7 @@ gem "daemons", "~> 1"
 gem "delayed_job_active_record", "~> 4"
 
 # Exception monitoring
-gem "sentry-raven", "~> 0.15"
+gem "sentry-raven", "~> 3.1.2"
 
 # Fancy counter caches
 gem "counter_culture", "~> 2.0"

Gemfile.lock

@@ -202,11 +202,10 @@ GEM
     factory_bot_rails (6.2.0)
       factory_bot (~> 6.2.0)
       railties (>= 5.0.0)
-    faraday (2.7.11)
-      base64
-      faraday-net_http (>= 2.0, < 3.1)
-      ruby2_keywords (>= 0.0.4)
-    faraday-net_http (3.0.2)
+    faraday (2.9.0)
+      faraday-net_http (>= 2.0, < 3.2)
+    faraday-net_http (3.1.0)
+      net-http
     fast_inserter (2.0.0)
       activerecord (>= 4.1.0)
     fastly (2.5.3)
@@ -271,6 +270,8 @@ GEM
     minitest (5.22.2)
     multi_json (1.15.0)
     multi_xml (0.6.0)
+    net-http (0.4.1)
+      uri
     net-imap (0.4.10)
       date
       net-protocol
@@ -414,7 +415,6 @@ GEM
       rack (>= 1.1)
       rubocop (>= 1.33.0, < 2.0)
     ruby-progressbar (1.13.0)
-    ruby2_keywords (0.0.5)
     rubyzip (2.3.2)
     safely_block (0.4.0)
     sanitize (6.1.0)
@@ -442,8 +442,8 @@ GEM
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
-    sentry-raven (0.15.6)
-      faraday (>= 0.7.6)
+    sentry-raven (3.1.2)
+      faraday (>= 1.0)
     snaky_hash (2.0.1)
       hashie
       version_gem (~> 1.1, >= 1.1.1)
@@ -467,6 +467,7 @@ GEM
       unf_ext
     unf_ext (0.0.8.2)
     unicode-display_width (2.4.2)
+    uri (0.13.0)
     uuidtools (2.2.0)
     version_gem (1.1.3)
     warden (1.2.9)
@@ -566,7 +567,7 @@ DEPENDENCIES
   sdoc
   select2-rails
   selenium-devtools
-  sentry-raven (~> 0.15)
+  sentry-raven (~> 3.1.2)
   uglifier (>= 1.3.0)
   uuidtools (~> 2)
   webmock (~> 3)