Added new RandomRangedGenerator test using PLINQ for thread safety testing.
Removed original slower RandomRangedGenerator async test
Changed test  to use Assert.DoesNotThrow instead of try-catch
Parameterized test, changed name back to original name.  Changed assert back to try-catch.
Removed try-catch from test so AggregateException will now bubble up to test runner.
Merge branch '227-randomrangedgeneratortest-performance' of https://github.com/dlongest/AutoFixture into dlongest-227-randomrangedgeneratortest-performance
Replaced lock with ConcurrentDictionary in RandomRangedNumberGenerator
Moved call to ConvertLimits inside factory delegate
Merge branch '227-change-impl-to-concurrentdict' of https://github.com/dlongest/AutoFixture into dlongest-227-change-impl-to-concurrentdict
Updated Zero29 NuGet package.
Incremented patch version,

in order to indicate that the code change in RandomRangedNumberGenerator
is mostly about readability and, perhaps, also a small performance
improvement.