[Gemspec] Bump Molinillo to `~> 0.6.4`

Gemfile.lock

@@ -17,10 +17,10 @@ GIT
 
 GIT
   remote: https://github.com/CocoaPods/Molinillo.git
-  revision: de2ad268571d26d851938af8da5bf60eab29399f
+  revision: beb24a0789aa67f9adef47991d3f19f72f62c4a8
   branch: master
   specs:
-    molinillo (0.6.3)
+    molinillo (0.6.4)
 
 GIT
   remote: https://github.com/CocoaPods/Nanaimo.git
@@ -117,7 +117,7 @@ PATH
       escape (~> 0.0.4)
       fourflusher (~> 2.0.1)
       gh_inspector (~> 1.0)
-      molinillo (~> 0.6.1)
+      molinillo (~> 0.6.4)
       nap (~> 1.0)
       ruby-macho (~> 1.1)
       xcodeproj (>= 1.5.3, < 2.0)
@@ -295,4 +295,4 @@ DEPENDENCIES
   xcodeproj!
 
 BUNDLED WITH
-   1.15.3
+   1.15.4

cocoapods.gemspec

@@ -37,7 +37,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency 'cocoapods-stats',       '>= 1.0.0', '< 2.0'
   s.add_runtime_dependency 'cocoapods-trunk',       '>= 1.3.0', '< 2.0'
   s.add_runtime_dependency 'cocoapods-try',         '>= 1.1.0', '< 2.0'
-  s.add_runtime_dependency 'molinillo',             '~> 0.6.1'
+  s.add_runtime_dependency 'molinillo',             '~> 0.6.4'
   s.add_runtime_dependency 'xcodeproj',             '>= 1.5.3', '< 2.0'
 
   ## Version 5 needs Ruby 2.2, so we specify an upper bound to stay compatible with system ruby