Fixes#3494
Removes `class="next-head"` from the children of the `<Head>` component. Instead, a single sentinel meta element named `next-head-count` is appended. The content is the number of contiguous elements immediately preceding the sentinel that _would have had_ the `class="next-head"` attribute.
During an update, instead of searching for `class="next-head"`, the sentinel is located and the N previous elements are considered candidates for `oldTags`. New elements are inserted before the sentinel, and finally the sentinel is updated to reflect the new count.
* Refresh query on mount for exported pages
* Make sure to only refresh query if it is different
* Only update if search isn't empty
* Merge pre-rendered query values with
current query values
* Remove dynamic restriction for autoExporting
* Update dynamic routing test fo autoExport
* Remove autoExport from client-navigation test
* Remove logs and update trailing slash config
* Update nextExport tests in client-navigation
* Disable autoExport in export suite
* Run prettier over packages/**/*.js
* Run prettier over packages/**/*.ts
* Run prettier over examples
* Remove tslint
* Run prettier over examples
* Run prettier over all markdown files
* Run prettier over json files
* Add automatic exporting of pages with no getInitialProps
* Add support for exporting serverless to static
and serving the html files during next start
* Fix missing runtimeEnv when requiring page, re-add warning
when trying to export with serverless, and update tests
* Update flying-shuttle test
* revert un-used pagesManifest change
* remove query.amp RegExp test
* Fix windows backslashes not being replaced
* Re-enable serverless support for next start
* bump
* Fix getInitialProps check
* Fix incorrect error check
* Re-add check for reserved pages
* Fix static check
* Update to ignore /api pages and clean up some tests
* Re-add needed next.config for test and correct behavior
* Update RegExp for ignored pages for auto-static
* Add checking for custom getInitialProps in pages/_app
* Update isPageStatic logic to only use default export
* Re-add retrying to CircleCi
* Update query during dev to only have values
available during export for static pages
* Fix test
* Add warning when page without default export is
found and make sure to update pages-manifest
correctly in flying-shuttle mode
* Fix backslashes not being replaced
* Integrate auto-static with flying-shuttle
and make sure AMP is handled in flying-shuttle
* Add autoExport for opting in
Update tests to setup webdriver stuff in `jest-environment` and re-use one browser session instead of spawning one for each webdriver call to prevent creating too many BrowserStack sessions.
* Add default viewport meta tag (fixes#6698)
* Do not inject default viewport when rendering an AMP document
* Remove redundant viewport on error page
* Plumb withSideEffect() to pass through props, then use that for isAmp.
* Add tests for viewport meta tag.
* Fix linting
* Update dedupes test
* Break out client-navigation and rendering
test from basic test
* Try with parallelism dialed back to 3
* Update jest-junit for more compatible timings in CircleCI
* Bump to test timings
* Use filepath for suitename in jest-junit
* Store reports as artifacts
* Try using classname for timings
* Bump
* Remove reports from artifacts
