Fix so that Rule can be subclassed

[jspenc72]

Swift 3 is adding 2 more access levels (open and fileprivate) and changing the meaning of private:

private: symbol visible within the current declaration only.
fileprivate: symbol visible within the current file.
internal: symbol visible within the current module.
public: symbol visible outside the current module.
open: for class or function to be subclassed or overridden outside the current module.

In Swift 3 you can now mark a class as open instead of public this allows files outside of the module to subclass that class.

[codecov-io]

Codecov Report

Merging #177 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #177   +/-   ##
=======================================
  Coverage   80.82%   80.82%           
=======================================
  Files          26       26           
  Lines         485      485           
=======================================
  Hits          392      392           
  Misses         93       93

Impacted Files	Coverage Δ
SwiftValidator/Rules/RegexRule.swift	100% <ø> (ø)	⬆️

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[jpotts18]

Sorry for the delay @jspenc72 I don't do Swift in my day-to-day and this project is suffering. Would you be interested in becoming a contributor?

[jspenc72]

I'd be happy to be a contributor.

…

On Jul 9, 2017, at 5:22 PM, Jeff Potter ***@***.***> wrote: Sorry for the delay @jspenc72 I don't do Swift in my day-to-day and this project is suffering. Would you be interested in becoming a contributor? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.

[jpotts18]

@jspenc72 I"ve added you as a contributor can you please merge these changes and make sure any necessary documentation and tests are added that prove the functionality changes. Still learning about permissions on organization so let me know if you see any hiccups

[jspenc72]

Ill have a look tonight and get things merged in.

[davepatterson]

@jspenc72 This was addressed in #175

[jspenc72]

Thanks for letting me know

…

On Jul 16, 2017, at 2:58 PM, David Patterson ***@***.***> wrote: @jspenc72 This was addressed in #175 — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.