Rubocop updates & binstubs

.rubocop.yml

@@ -1,13 +1,20 @@
 AllCops:
-  TargetRubyVersion: 2.5
+  TargetRubyVersion: 2.6
+  NewCops: enable
+
+Style/StringLiterals:
+  Enabled: true
+  EnforcedStyle: double_quotes
+
+Style/StringLiteralsInInterpolation:
+  Enabled: true
+  EnforcedStyle: double_quotes
+
+Style/Documentation:
+  Enabled: false
+
+Layout/LineLength:
+  Max: 150
 
 Metrics/BlockLength:
-  Exclude:
-    - 'spec/**/*.rb'
-
-Metrics/LineLength:
-  Max: 100
-
-Naming/FileName:
-  Exclude:
-    - 'lib/*.rb'
+  IgnoredMethods: ['describe', 'context', 'shared_examples']