Merge pull request #7 from ktb88/master

fixed BooleanLiteral value

Author: tintinweb

solidity_parser/parser.py

@@ -639,7 +639,7 @@ def visitPrimaryExpression(self, ctx):
         if ctx.BooleanLiteral():
             return Node(ctx=ctx,
                         type='BooleanLiteral',
-                        value=ctx.BooleanLiteral().getText() == 'True')
+                        value=ctx.BooleanLiteral().getText() == 'true')
 
         if ctx.HexLiteral():
             return Node(ctx=ctx,