Bump bootstrap from 3.4.0 to 3.4.1

[dependabot[bot]]

Bumps bootstrap from 3.4.0 to 3.4.1.

Release notes

Sourced from bootstrap's releases.

v3.4.1

• Security: Fixed an XSS vulnerability (CVE-2019-8331) in our tooltip and popover plugins by implementing a new HTML sanitizer
• Handle bad selectors (#) in data-target for Dropdowns
• Clarified tooltip selector documentation
• Added support for NuGet contentFiles

Commits

• 68b0d23 Dist
• 2ccfa57 handle # selector for dropdown
• a43077d Bump version to 3.4.1.
• d821de2 Backport sanitize docs from v4.
• 5cd9ef4 Add wdm gem for Windows.
• d6b8501 ES5 fixes.
• 2c8abb9 Add sanitize for tooltips and popovers html content.
• d4129df Bump year.
• 0d64d6a less/modals.less: Add missing semicolon.
• 48c5d7b Use https.
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot ignore this [patch|minor|major] version will close this PR and stop Dependabot creating any more for this minor/major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)
• @dependabot use these labels will set the current labels as the default for future PRs for this repo and language
• @dependabot use these reviewers will set the current reviewers as the default for future PRs for this repo and language
• @dependabot use these assignees will set the current assignees as the default for future PRs for this repo and language
• @dependabot use this milestone will set the current milestone as the default for future PRs for this repo and language

You can disable automated security fix PRs for this repo from the Security Alerts page.