v0.3.0-rc1

What's Changed

• cherry pick changelog v0.2.0 to main by @tomqin93 in #286
• Bump github.com/gopcua/opcua from 0.3.5 to 0.3.6 by @dependabot in #281
• Bump github.com/onsi/gomega from 1.20.2 to 1.21.1 by @dependabot in #290
• Bump github.com/gopcua/opcua from 0.3.6 to 0.3.7 by @dependabot in #289
• remove incorrect milestones in README by @saiyan86 in #287
• add unit test for push telementry by @kris21he in #280
• Update README.md by @Yang-Xijie in #282
• Modified existing telemetry service design by @BtXin in #279
• Add unit test in deviceshifuhttp by @kris21he in #291
• imeplement setup demo script by @MrLeea-13155bc in #283
• imeplement plc4x by @MrLeea-13155bc in #275
• Created guide for develop deviceshifu by @BtXin in #295
• Update develop-deviceshifu.md by @BtXin in #297
• add push pipeline by @MrLeea-13155bc in #296
• fix typo by @Yang-Xijie in #298
• Fix PLC4x pipeline by @MrLeea-13155bc in #300
• Fix usermetrics interval doc by @BtXin in #301
• fix dockerfile of plc4x by @MrLeea-13155bc in #305
• Bump github.com/onsi/gomega from 1.21.1 to 1.22.0 by @dependabot in #306
• update quay.io/brancz/kube-rbac-proxy to bitnami/kube-rbac-proxy by @tomqin93 in #309
• customized data process (deviceshifu) for python by @seanli33056 in #254
• Clear unused func and add a little UT by @MrLeea-13155bc in #307
• CHANGELOG for Release v0.3.0 by @tomqin93 in #312

Full Changelog: v0.2.0...v0.3.0-rc1