Update jsdom requirement from ^8.1.0 to ^15.1.1

[dependabot-preview]

Updates the requirements on jsdom to permit the latest version.

Changelog

Sourced from jsdom's changelog.

15.1.1

• Moved the nonce property from HTMLScriptElement and HTMLStyleElement to HTMLElement. Note that it is still just a simple reflection of the attribute, and has not been updated for the rest of the changes in whatwg/html#2373.
• Fixed the style and on<event> properties to properly track their related attributes for SVG elements. (kbruneel)
• Fixed XMLHttpRequest merging preflight and response headers. (thiagohirata)
• Fixed XMLHttpRequest reserializing content-type request headers unnecessarily. See whatwg/mimesniff#84 for more details. (thiagohirata)
• Fixed element.tagName to be the ASCII uppercase of the element's qualified name, instead of the Unicode uppercase.

15.1.0

• Added the Headers class from the Fetch standard.
• Added the element.translate getter and setter.
• Fixed synchronous XMLHttpRequest on the newly-released Node.js v12.
• Fixed form.elements to exclude <input type="image"> elements.
• Fixed event path iteration in shadow DOM cases, following spec fixes at whatwg/dom#686 and whatwg/dom#750.
• Fixed pattern="" form control validation to apply the given regular expression to the whole string. (kontomondo)

15.0.0

Several potentially-breaking changes, each of them fairly unlikely to actually break anything:

• JSDOM.fromFile() now treats .xht files as application/xhtml+xml, the same as it does for .xhtml and .xml. Previously, it would treat them as text/html.
• If the JSDOM constructor's contentType option has a charset parameter, and the first argument to the constructor is a binary data type (e.g. Buffer or ArrayBuffer), then the charset will override any sniffed encoding in the same way as a Content-Type header would in browser scenarios. Previously, the charset parameter was ignored.
• When using the Blob or File constructor with the endings: "native" option, jsdom will now convert line endings to \n on all operating systems, for consistency. Previously, on Windows, it would convert line endings to \r\n.

14.1.0

• Added activation behavior for <a> and <area> elements whose href="" points to a javascript: URL or fragment.
• Added the <datalist> element's options property.
• Added the <input> element's list property.
• Added PageTransitionEvent, and the firing of pageshow events during loading.
• Exposed the External class as a property of window.
• Fixed HTML fragment parsing (via innerHTML and outerHTML) to be spec-compliant. (pmdartus)
• Fixed HTML serialization (e.g. via innerHTML) breaking after setting certain properties to non-string values.
• Fixed how disabling an element would cause its activation behavior to forever be null, even if it were re-enabled.
• Fixed all access to attributes to ignore attributes with namespaces, per the spec.
• Fixed <style>s to no longer apply to documents without a browsing context. This includes fixing a crash that would occur with such styles if they had an @import rule.
• Fixed <option>'s label and value properties to return correct values in various edge cases.
• Fixed the load event during document loading to target the Document, not the Window.
• Fixed the pretendToBeVisual option to propagate to child subframes, as well as the main Window. (pyrho)
• Updated the minimum nwsapi version from v2.1.1 to v2.1.3, bringing along a few fixes in our selector engine.

14.0.0

Breaking changes:

• JSDOM.fragment() now creates fragments whose document has no browsing context, i.e. no associated Window. This means the defaultView property will be null, resources will not load, etc.
• JSDOM.fragment(), called with no arguments, now creates a DocumentFragment with no children, instead of with a single child text node whose data was "undefined".

Other changes:

... (truncated)

Commits

• 0371215 Version 15.1.1
• dd6c5a0 Do not reserialize XHR content-types unnecessarily
• 7cd5329 Do not merge XHR preflight and response headers
• 9f6b190 Keep track of style and event attribute changes in SVGElement
• 1951a19 Use ASCII uppercase for tagName
• 1c8e963 Add HTMLOrSVGElement interface mixin
• 8533b57 Use interface mixins
• c1b4591 Escape null in WebIDL2JSValueAsUnsupported
• 93944f6 Update ESLint to v5
• 9f273fe Update dependencies
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #20.