Use a forked version of eslintrb for now

fixes #6866
upstream https://github.com/zendesk/eslintrb/pull/7

Gemfile

@@ -250,6 +250,9 @@ group :development do
   gem "pronto-haml",    "0.6.0"
   gem "pronto-scss",    "0.6.0", require: false
 
+  # We need to use a fork of eslintrb until https://github.com/zendesk/eslintrb/pull/7 is merged
+  gem "eslintrb",       github: "denschub/eslintrb", ref: "8e6eec682909ae5dabb2609b3ac6331f128cf539"
+
   # Preloading environment
 
   gem "spring", "1.7.1"

Gemfile.lock

+GIT
+  remote: git://github.com/denschub/eslintrb.git
+  revision: 8e6eec682909ae5dabb2609b3ac6331f128cf539
+  ref: 8e6eec682909ae5dabb2609b3ac6331f128cf539
+  specs:
+    eslintrb (2.0.4)
+      execjs
+      multi_json (>= 1.3)
+      rake
+
 GEM
   remote: https://rubygems.org/
   remote: https://rails-assets.org/
@@ -199,10 +209,6 @@ GEM
       railties (>= 4.1, <= 5)
     equalizer (0.0.10)
     erubis (2.7.0)
-    eslintrb (2.0.4)
-      execjs
-      multi_json (>= 1.3)
-      rake
     ethon (0.9.0)
       ffi (>= 1.3.0)
     excon (0.49.0)
@@ -931,6 +937,7 @@ DEPENDENCIES
   diaspora_federation-rails (= 0.0.13)
   diaspora_federation-test (= 0.0.13)
   entypo-rails (= 3.0.0.pre.rc2)
+  eslintrb!
   eye (= 0.8.1)
   factory_girl_rails (= 4.7.0)
   faraday (= 0.9.2)