Vue 2.6.11 release, bug fix version

Vue 2.6.11 release, updates include:

Security Fixes

• vue-server-renderer of serialize-javascript dependency change to 2.1.2

Bug Fixes

• Type: Fixed prop constructor type inference ( # 10779 )  4821149 , Closes  # 10779
• Repair functions Expressions Regular expressions ( # 9922 )  569b728 , Closes  # 9922  # 9920
• Compiler: Remove effective slot values v Warning ( # 9917 )  085d188 , Closes  # 9917
• Type: UMD bundled software fix global namespace declaration ( # 9912 )  ab50e8e , Closes  # 9912

Update Description: https://github.com/vuejs/vue/releases/tag/v2.6.11