Support for non-int time ranges in timex in c#

[sibbl]

Describe the bug
From LUIS, I get a Timex valued PT0.5H. I'd like to parse the string with this library, but the parts (i.e. hours) must be an int. See code.

To Reproduce
Steps to reproduce the behavior:

1. Parse a Timex from the string PT0.5H via TimexResolver.Resolve(new[] { "PT0.5H });
2. A ThrowOverflowOrFormatException is thrown.

Expected behavior
The timex is parsed properly.

Platform (please complete the following information):

• Platform: C#
• Environment: nuget package
• Version of package: 1.8.8

[sibbl]

Could decimal.Parse straight into the decimal Hours variable already solve it perhaps?