Incorrect transpile error handling this keyword

[netil]

Description

this within arrow function isn't transpiled as expected.
Arrow function block is transformed to function block, but this stays same. Hence this doesn't refer correct context.

// target
Object.keys(classes).forEach(v => {
    this[v] = new classes[v]();
});

// transpiled
Object.keys(Store_classes).forEach(function (v) {
    this[v] = new Store_classes[v]();
});