(w.i.p) Add more parser tests.
Correct dump expressions. Add dump of NotExpression.
Correct misspelled method name. Add dump of match expression and regexp.
Add support for match expr with quoted text as RHS.

This adds support for expressions like 'a'=~ "ends with ${foo}" to
interpolate into the regular expression (a string is compiled into a
regular expression).
Add more parser tests.

W.I.P on adding parser tests.
Correct model generation of VARIABLE to use fqn instead of string.

It generated $'name' instead of $name.
Add tests of literal lists.

Corrects several small issues related to literal lists.
Adds a node about hasharrayaccess in the grammar - adds pending tests
for not (easily) supported wanted expressions like [1,2,3][2] which
also prevents calledfunc(10)[10] without use of intermediate variable.