PlantUML bumped to 8002

PlantUML bumped to 8002, where [this bug](http://plantuml.sourceforge.net/qa/?qa=2237) of the parser has been fixed.

It was impossible to use both 'extends' and 'implements' statements in the same class. For example, A and B are classes, and C is an interface:

1) class A **extends** B: it works **OK**

2) class A **implements** C: it works **OK**

3) class A **extends** B **implements** C: it causes **SYNTAX ERROR**