Update .rubocop.yml to run RuboCop 0.76 using Ruby 2.3

To address these errors:

```ruby
$ bundle exec rubocop
Error: The `Style/UnneededPercentQ` cop has been renamed to `Style/RedundantPercentQ`.
(obsolete configuration found in .rubocop.yml, please update it)
The `Layout/FirstParameterIndentation` cop has been renamed to `Layout/IndentFirstArgument`.
(obsolete configuration found in .rubocop.yml, please update it)
obsolete `EnforcedStyle: rails` (for Layout/IndentationConsistency) found in .rubocop.yml
`EnforcedStyle: rails` has been renamed to `EnforcedStyle: indented_internal_methods`
$
```

```
$ bundle exec rubocop
Error: RuboCop found unsupported Ruby version 2.2 in `TargetRubyVersion` parameter (in .rubocop.yml). 2.2-compatible analysis was dropped after version 0.69.
Supported versions: 2.3, 2.4, 2.5, 2.6, 2.7
$
```

Author: yahonda

.rubocop.yml

@@ -2,7 +2,7 @@
 # We should not use cops only available for Ruby 2.1 or later
 # since ruby-plsql itself supports Ruby 1.9.3
 AllCops:
-  TargetRubyVersion: 2.2
+  TargetRubyVersion: 2.3
   DisabledByDefault: true
 
 # Prefer &&/|| over and/or.
@@ -45,7 +45,7 @@ Layout/EmptyLinesAroundMethodBody:
 Layout/EmptyLinesAroundModuleBody:
   Enabled: true
 
-Layout/FirstParameterIndentation:
+Layout/IndentFirstArgument:
   Enabled: true
 
 # Use Ruby >= 1.9 syntax for hashes. Prefer { a: :b } over { :a => :b }.
@@ -56,7 +56,7 @@ Style/HashSyntax:
 # extra level of indentation.
 Layout/IndentationConsistency:
   Enabled: true
-  EnforcedStyle: rails
+  EnforcedStyle: indented_internal_methods
 
 # Two spaces, no tabs (for indentation).
 Layout/IndentationWidth:
@@ -130,7 +130,7 @@ Layout/TrailingWhitespace:
   Enabled: true
 
 # Use quotes for string literals when they are enough.
-Style/UnneededPercentQ:
+Style/RedundantPercentQ:
   Enabled: true
 
 # Align `end` with the matching keyword or starting expression except for