Update README.md - Fix Typo
Merge pull request #1 from kumavis/patch-1

Update README.md - Fix Typo
test negative numbers
0.0.2
wrap context with Object.create, implement static-eval direct, prototype chain access
0.1.0
inner function support
0.2.0
don't allow built in properties to be changed
0.3.0
support ThisExpression
fixed computed MemberExpression
init with ast or string
handle empty statements
support for UpdateExpression and increment assignment
ForStatement support
0.4.0
safeFunction
removed unnessary tree variable
fixed inner context shadowing

closes #8