Virtus to version 1.0.1. Bye-bye backports

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

Gemfile.lock

@@ -51,7 +51,6 @@ GEM
     axiom-types (0.0.5)
       descendants_tracker (~> 0.0.1)
       ice_nine (~> 0.9)
-    backports (3.3.5)
     bcrypt-ruby (3.1.2)
     better_errors (1.0.1)
       coderay (>= 1.0.0)
@@ -84,8 +83,7 @@ GEM
     code_analyzer (0.4.3)
       sexp_processor
     coderay (1.1.0)
-    coercible (0.2.0)
-      backports (~> 3.0, >= 3.1.0)
+    coercible (1.0.0)
       descendants_tracker (~> 0.0.1)
     coffee-rails (4.0.1)
       coffee-script (>= 2.2.0)
@@ -541,9 +539,9 @@ GEM
       kgio (~> 2.6)
       rack
       raindrops (~> 0.7)
-    virtus (1.0.0)
+    virtus (1.0.1)
       axiom-types (~> 0.0.5)
-      coercible (~> 0.2)
+      coercible (~> 1.0)
       descendants_tracker (~> 0.0.1)
       equalizer (~> 0.0.7)
     warden (1.2.3)