Revert "Revert "zodbpickle: v↑ (1.0.4 -> 2.0.0)""

This reverts commit 27f574bc.

NEO now should support zodbpickle >= 2 with nexedi/neoppod!19.

/cc @jerome

component/ZODB/buildout.cfg

@@ -96,7 +96,7 @@ setup-eggs = ${python-cffi:egg}
 [versions]
 BTrees = 4.5.1
 persistent = 4.6.4
-zodbpickle = 1.0.4
+zodbpickle = 2.0.0
 
 # Provide ZODB3 for those eggs that still care about ZODB3 compatibility -
 # for example wendelin.core. ZODB3 3.11 is just a dependency egg on _latest_