Update deps
FIX: mprSerialize and mprDeserialize were not correctly handling embedded quotes and were truncating some input.
Cleanup
FIX: Windows single-core lock primitives.

Code was using SpinCount which is set to zero on single core systems.

Solution: Added MprMutex.freed flag.
FIX: mprSerialize / mprDeserialize for embedded quotes

Was not parsing properties with embedded, quoted JSON.
Add missing freed field to MprSpin
Resolve merge conflicts
Cleanup
REFACTOR: rename mprGetJsonValue => mprGetJson.
mprLookupJsonValue to mprLookupJson.