Bump version to reflect architecture -> layer (#69)

Co-authored-by: Ashley Willard <ashley.willard@gusto.com>

Author: tstannard

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    visualize_packs (0.5.23)
+    visualize_packs (0.6.0)
       bigdecimal
       packs-specification
       parse_packwerk (>= 0.20.0)

visualize_packs.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |spec|
   spec.name          = "visualize_packs"
-  spec.version       = '0.5.23'
+  spec.version       = '0.6.0'
   spec.authors       = ['Gusto Engineers']
   spec.email         = ['dev@gusto.com']
   spec.summary       = 'A gem to visualize connections in a Ruby app that uses packs'