Update dependency pug to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
pug (source)	^2.0.0-rc.4 -> ^3.0.0

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Release Notes

pugjs/pug

v3.0.2

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Bug Fixes

• Serialize Buffers to strings when storing sources for use with compileDebug: true (#​3269)

v3.0.1

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Bug Fixes

• Sanitise the pretty option (#​3314)

  If a malicious attacker could control the pretty option, it was possible for them to achieve remote code execution on the server rendering the template. All pug users should upgrade as soon as possible, see #​3312 for more details.

v3.0.0

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Breaking Changes

• read plugins must now return Buffer if you want to support filters that use renderBuffer (#​3213)

  If you don't wish to support this advanced use case, you can continue returning string. If you did not provide a read plugin, you do not need to do anything.

• The minify option on filters now requires you to install the relevant jstransformer (#​3084)

  Currently we support:

  • jstransformer-uglify-js for JavaScript
  • jstransformer-clean-css for CSS

• Drop support for node 6 and 8 (#​3243)

New Features

• Support filters that apply to Buffers (#​3213)

  e.g.

  // options.js
  exports.filters = {
    png: {
      // instead of a function, specify an object with a "renderBuffer" property
      // whose value is a function that takes a Buffer instead of a string
      renderBuffer: function(buffer, options) {
        var data = Buffer.from(buffer).toString('base64');
        return '<img src="data:image/png;base64, ' + data + '"/>';
      }
    }
  };

  You can then use the filter like:

  // foo.pug
  include:png my-small-image.png

• Add support for replacing code gen via a plugin with generateCode (#​3230)

• Support each ... of ... loops (#​3179)

  each value of iterable
    li= value

  This requires an environment that supports the for (const val of iterable) syntax in JS. You can iterate over Maps, Sets etc. as well as arrays. There is also some destructuring of map keys:

  - const map = new Map([['a', 'x'], ['b', 'y']]);
  each [key, value] of map
    li
      strong= key
      = value

v2.0.4: 2.0.4

Compare Source

• fix: improve error message when requiring a filter that's not installed
• fix: toJSON is now only called on object-like values
• fix: preLex plugins were not called when compiling from a string
• perf: add "files" property to exclude un-used files from package and reduce install size
• feat: support ... spread attributes when compiling to JSX N.B. this will not work when rendering to HTML

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