Update vue monorepo to v2.6.11

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
vue	devDependencies	patch	2.6.10 -> 2.6.11
vue-template-compiler	devDependencies	patch	2.6.10 -> 2.6.11

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Release Notes

vuejs/vue

v2.6.11

Compare Source

Security Fixes

• Bump vue-server-renderer's dependency of serialize-javascript to 2.1.2

Bug Fixes

• types: fix prop constructor type inference (#​10779) 4821149, closes #​10779
• fix function expression regex (#​9922) 569b728, closes #​9922 #​9920
• compiler: Remove the warning for valid v-slot value (#​9917) 085d188, closes #​9917
• types: fix global namespace declaration for UMD bundle (#​9912) ab50e8e, closes #​9912

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[coveralls]

Coverage remained the same at 92.857% when pulling b14dce1 on renovate/vue-monorepo into 20c69b9 on master.