Update timecop 0.8.0 -> 0.9.1

Gemfile

@@ -383,7 +383,7 @@ group :development, :test do
 
   gem 'simple_po_parser', '~> 1.1.2', require: false
 
-  gem 'timecop', '~> 0.8.0'
+  gem 'timecop', '~> 0.9.1'
 
   gem 'png_quantizator', '~> 0.2.1', require: false
 

Gemfile.lock

@@ -1065,7 +1065,7 @@ GEM
     thread_safe (0.3.6)
     thrift (0.11.0.0)
     tilt (2.0.10)
-    timecop (0.8.1)
+    timecop (0.9.1)
     timfel-krb5-auth (0.8.3)
     toml (0.2.0)
       parslet (~> 1.8.0)
@@ -1387,7 +1387,7 @@ DEPENDENCIES
   sys-filesystem (~> 1.1.6)
   test-prof (~> 0.10.0)
   thin (~> 1.7.0)
-  timecop (~> 0.8.0)
+  timecop (~> 0.9.1)
   toml-rb (~> 1.0.0)
   truncato (~> 0.7.11)
   u2f (~> 0.2.1)