Gemfile is cleaned up and drop ruby support below 2.5 version

Gemfile

@@ -1,10 +1,3 @@
 source "https://rubygems.org"
 
-gem "minitest", "~> 5.2"
-gem "cells-erb"#, path: "../cells-erb"
-gem "benchmark-ips"
-gem "minitest-line"
-
 gemspec
-
-# gem "uber", path: "../uber"

cells.gemspec

@@ -1,31 +1,38 @@
-lib = File.expand_path("../lib/", __FILE__)
-$:.unshift lib unless $:.include?(lib)
-
-require "cell/version"
+require_relative 'lib/cell/version'
 
 Gem::Specification.new do |spec|
-  spec.name        = "cells"
+  spec.name        = 'cells'
   spec.version     = Cell::VERSION
-  spec.platform    = Gem::Platform::RUBY
-  spec.authors     = ["Nick Sutterer"]
-  spec.email       = ["apotonick@gmail.com"]
-  spec.homepage    = "https://github.com/apotonick/cells"
-  spec.summary     = %q{View Models for Ruby and Rails.}
-  spec.description = %q{View Models for Ruby and Rails, replacing helpers and partials while giving you a clean view architecture with proper encapsulation.}
-  spec.license     = "MIT"
+  spec.authors     = ['Nick Sutterer']
+  spec.email       = ['apotonick@gmail.com']
+  spec.homepage    = 'https://github.com/trailblazer/cells'
+  spec.summary     = 'View Models for Ruby and Rails.'
+  spec.description = 'View Models for Ruby and Rails, replacing helpers and partials while giving you a clean view architecture with proper encapsulation.'
+  spec.license     = 'MIT'
+
+  spec.metadata['bug_tracker_uri'] = "#{spec.homepage}/issues"
+  spec.metadata['changelog_uri'] = "#{spec.homepage}/blob/HEAD/CHANGES.md"
+  spec.metadata['documentation_uri'] = 'https://trailblazer.to/2.1/docs/cells'
+  spec.metadata['homepage_uri'] = spec.homepage
+  spec.metadata['source_code_uri'] = spec.homepage
+  spec.metadata['wiki_uri'] = "#{spec.homepage}/wiki"
 
-  spec.files         = `git ls-files`.split("\n")
-  spec.test_files    = `git ls-files -- {test}/*`.split("\n")
-  spec.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
-  spec.require_paths = ["lib"]
+  spec.files = Dir.chdir(__dir__) do
+    `git ls-files -z`.split("\x0").reject do |file|
+      file.start_with?(*%w[.git Gemfile Rakefile TODO test])
+    end
+  end
+  spec.require_paths = ['lib']
+  spec.required_ruby_version = '>= 2.5'
 
-  spec.add_dependency "uber", "< 0.2.0"
+  spec.add_dependency 'declarative-builder', '~> 0.2.0'
+  spec.add_dependency 'tilt', '>= 1.4', '< 3'
   spec.add_dependency "declarative-option", "< 0.2.0"
-  spec.add_dependency "declarative-builder", "< 0.2.0"
-  spec.add_dependency "tilt", ">= 1.4", "< 3"
+  spec.add_dependency 'uber', '< 0.2.0'
 
-  spec.add_development_dependency "rake"
-  spec.add_development_dependency "capybara"
-  spec.add_development_dependency "cells-erb", ">= 0.0.4"
+  spec.add_development_dependency 'capybara'
+  spec.add_development_dependency 'cells-erb', '>= 0.1.0'
+  spec.add_development_dependency 'minitest'
+  spec.add_development_dependency 'rake'
   spec.add_development_dependency 'debug'
 end

lib/cell/view_model.rb

@@ -198,8 +198,7 @@ def process_options!(options)
 
     # Computes the view name from the call stack in which `render` was invoked.
     def state_for_implicit_render(options)
-      _caller = RUBY_VERSION < "2.0" ? caller(3) : caller(3, 1) # TODO: remove case in 5.0 when dropping 1.9.
-      _caller[0].match(/`(\w+)|#(\w+)'/).captures.compact.first
+      caller(3, 1)[0].match(/`(\w+)|#(\w+)'/).captures.compact.first
     end
 
     include Layout