Async methods

[emilos]

Story

As a developer, I want to have async methods, like replaceAsync

Acceptance criteria

• [ ] replaceAsync
• [ ] findAsync
• [ ] ...

[inikonorov]

just wrap functions in promises?) f.e.

return new Promise((resolve, reject) => {
    // ..function code
    resolve()

    // or if occured any mistake
    reject()
})

[emilos]

@inikonorov that would be a good start :) long term, I'd like to make async functions a bit more flexible, but it's not necessary for this issue