v3.0.0-beta

support vue-next

What's Changed

• fix eslint error by @ygj6 in #637
• Test framework by @wangsongc in #668
• fix issue#658,重构插入代码块逻辑 by @ygj6 in #661
• Bump elliptic from 6.5.3 to 6.5.4 by @dependabot in #677
• Fixed pop-up style issues when pages use multiple editors by @wangsongc in #667
• fix eslint error and testcase by @ygj6 in #679
• support vue-next by @wangsongc in #712

Full Changelog: v2.9.1...v3.0.0-beta