Test properties in fuzzer

[niccokunzmann]

All properties should work in a consistent manner, whether capital case or lowercase.

For that, we can use OSS-FUZZ to detect issues in these properties.

Implementation idea:

• walk() through all the components
• getattr all their properties (select from a list)
• make sure they work
• create tests that make sure OSS FUZZ actually tests all possible properties and does not forget any

Related:

• from_ical() should only raise ICalParsingError #1448
• Make properties consistent #1474
• Add fuzzer issues #905