fix rubocop 0.53 new complaints

lib/licensee.rb

@@ -52,7 +52,8 @@ module Licensee
     # Inverse of the confidence threshold, represented as a float
     # By default this will be 0.05
     def inverse_confidence_threshold
-      @inverse ||= (1 - Licensee.confidence_threshold / 100.0).round(2)
+      @inverse_confidence_threshold ||=
+        (1 - Licensee.confidence_threshold / 100.0).round(2)
     end
   end
 end

lib/licensee/commands/diff.rb

@@ -41,7 +41,7 @@ class LicenseeCLI < Thor
     return options[:license_to_diff] if options[:license_to_diff]
     return project.license_file if remote?
 
-    @license_via_stdin ||= begin
+    @license_to_diff ||= begin
       if STDIN.tty?
         error 'You must pipe license contents to the command via STDIN'
         exit 1

licensee.gemspec

@@ -1,4 +1,4 @@
-require File.expand_path('../lib/licensee/version', __FILE__)
+require File.expand_path('lib/licensee/version', __dir__)
 
 Gem::Specification.new do |gem|
   gem.name    = 'licensee'