fix: IUnsubackPacket types definition

[ogis-yamazaki]

The implementation sets GRANTED in response to unsuback.

mqtt-packet/parser.js

Line 489 in ec5ad06

this.packet.granted.push(code)

However, it is not present in the type definition of IUnsubackPacket.

mqtt-packet/types/index.d.ts

Lines 160 to 167 in ec5ad06

	export interface IUnsubackPacket extends IPacket {
	cmd: 'unsuback',
	reasonCode?: number,
	properties?: {
	reasonString?: string,
	userProperties?: UserProperties
	}
	}

I made a PR, please check it out.

[robertsLando]

@mcollina Could you do a patch release please?

[robertsLando]

@mcollina Ping