Fixes for CLI-321

[Claudenw]

Adds BeanUtils dependency to POM and implements TypeHandler using the BeanUtils classes.

Handles all methods that were in the original TypeHandler as well as other default classes provided by BeanUtils. Test updated to show proper parsing of types that previously were not implemented.

Includes new cli.converters package that may be better handled by BeanUtils as it moves forward to support FunctionalInterfaces.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 67.27273% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.72%. Comparing base (c1f473c) to head (ad8466c).
⚠️ Report is 752 commits behind head on master.

Files with missing lines	Patch %	Lines
.../main/java/org/apache/commons/cli/TypeHandler.java	65.00%	13 Missing and 1 partial ⚠️
...apache/commons/cli/converters/SimpleConverter.java	62.50%	2 Missing and 1 partial ⚠️
.../main/java/org/apache/commons/cli/CommandLine.java	80.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #215      +/-   ##
============================================
- Coverage     93.20%   91.72%   -1.49%     
+ Complexity      570      560      -10     
============================================
  Files            21       22       +1     
  Lines          1207     1220      +13     
  Branches        215      209       -6     
============================================
- Hits           1125     1119       -6     
- Misses           46       63      +17     
- Partials         36       38       +2     

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[garydgregory]

I doubt we want to add a dependency on anything for Commons CLI, especially for what was meant to be a lightweight library. This would add Commons BeanUtils, Commons Logging, Commons Collections, and Commons Lang. It's a lot compared to JCommander and picocli...

[Claudenw]

Added getParsedOptionValue methods with default values. Switched to ConvertUtilsBean2 for conversions.

[Claudenw]

@garydgregory The code note was there and there is a lot of work in BeanUtils to make the conversions work cleanly. Might it be reasonable to make the dependency Optional so that if there is a wish to do BeanUtils (and other classes) are added, but for most cases it is not?

Alternatively, we could remove the TypeHandler implementation and add a Predicate and a Function into the Option definition. The Predicate would be used to verify that the string argument is proper for the Function (a precheck if you will) to catch the error early. The Function to convert from String to Object. This should probably be the Func interface I added as it allows Exceptions to be thrown. I think this might be a lighter weight option. If this sounds reasonable I will work on it.

[garydgregory]

Hello @Claudenw
Let's see what other folks think.

[Claudenw]

Reworked without BeanUtils as pull #216 I think that is a better solution. Will move forward with whichever version the community is happiest with.

[Claudenw]

Closed in favor of #216