Merge pull request #84 from github/anu/fix/erb-vulnerability

Update erb to 6.0.4 to fix deserialization guard bypass

Author: anumol-baby

Gemfile.lock

@@ -110,7 +110,7 @@ GEM
       reline (>= 0.3.8)
     diff-lcs (1.6.2)
     drb (2.2.3)
-    erb (6.0.2)
+    erb (6.0.4)
     erb_lint (0.9.0)
       activesupport
       better_html (>= 2.0.1)