Minor Improvements and Convenience Additions

New and Enhanced Features

• Added Tuple.of() and Tuple.empty() to create an empty tuple.

• The time out for bounded shrinking can now be changed in jqwik.properties

• Sample reporting will now report changes to parameters during property execution

• Added some convenience to use POJOs as builders:

  • BuilderCombinator.build(): Return arbitrary of builder itself
  • CombinableBuilder.inSetter(..): Set a builder's property and go on using it

• Added SampleReportingFormat.reportJavaBean(Object bean)

Breaking Changes

• Shrinking is no longer bound by number of shrinking attempts, but by time with a 10 seconds default.
  The reason is that counting shrinking attempts in a consistent manner was difficult, and
  shrinking could take very very long despite being in BOUNDED mode.

Bug Fixes

• edge cases generation will be stopped when 10000 edge cases have been found.
  See #113