v0.6.1

What's Changed

• Made Powermeter of Connector optional by @Pietfried in #79
• Initial StatusNotification.req by @Pietfried in #80
• Fix behavior on Connection Initialization Error by @Pietfried in #81
• Support for OCPP1.6 Plug&Charge Whitepaper by @Pietfried in #76
• Checking timers against nullptr before calling stop by @Pietfried in #82
• Hubject Plug&Charge requirements by @Pietfried in #83

Full Changelog: v0.5.2...v0.6.1