build(deps): bump base64-url and docpad

[dependabot[bot]]

Removes base64-url. It's no longer used after updating ancestor dependency docpad. These dependencies need to be updated together.

Removes base64-url

Updates docpad from 6.79.4 to 6.83.2

Changelog

Sourced from docpad's changelog.

v6.83.2 2020 September 8

• If the source path is missing, the correct and useful error is now displayed
• The deprecated srcPath is now removed, use sourcePaths to write and getPath('source') and getPath('sources') to read
• Extra debugging for when getting a path fails
• Updated documentation and website links to their new locations

v6.83.1 2020 August 5

• Add a new loadPlugins event for use in the docpad-plugintester to make sure all test plugins are properly loaded before docpadReady and other events are fired

v6.83.0 2020 August 5

• Removed superflous option aliases
  • outPath => outpath
  • configPaths, configPath, c => config
  • environment, e => env
  • logLevel => log
  • render --out, render -o => render --output
• Removed offline option, it can be re-added later if anyone uses it
• Removed the last bits of docpad cloud helper functionality
  • Removed skeleton functionality, just clone the repo from github instead
    • docpad skeleton => docpad init (same functionality as selecting no sekleton)
  • Removed version check
• Updated dependencies, base files, and editions using boundation
  • This will bring a massive performance boost to DocPad, especially with Caterpillar v6 which allows DocPad to disable fetching line information (a very expensive process) for log messages we don't care about
• Minimum required node version changed from node: >=6 to node: >=10 to keep up with mandatory ecosystem changes

v6.82.5 2018 October 1

• Prevent plugin false could not be loaded errors, now it will output the path that failed to be found, as expected

v6.82.4 2018 September 8

• Report the correct error for missing action requests
• Ensure docpad-plugintester dependency is latest

v6.82.3 2018 September 8

• Swapped out promptly for inquirer, which brings back Node v6 support (regression since v6.82.1)
  • Close [issue #1093](docpad/docpad#1093)

v6.82.2 2018 September 8

• Add logging support to the pluginloader to make debugging plugin resolutions easier
• Fixed failures of plugin loading and creation not being reported correctly
• Ensure all dependencies are the latest right now, to help fix false negatives in plugin resolution
• Close [thread #248](https://discuss.bevry.me/t/plugins-broken-in-6-82-1/573?u=balupton)

v6.82.1 2018 September 7

... (truncated)

Commits

• 85b3297 v6.83.2 - bugfixes
• e36e387 Bump underscore from 1.10.2 to 1.11.0 (#1119)
• e44cac1 Bump watchr from 6.6.0 to 6.8.0 (#1118)
• a7fe51a Bump scandirectory from 6.11.0 to 6.13.0 (#1116)
• 81929c3 Bump safefs from 6.11.0 to 6.12.0 (#1113)
• 0e9c4e0 Bump rfc-log-levels from 3.12.0 to 3.13.0 (#1114)
• 080eed2 Bump cson from 7.18.0 to 7.19.0 (#1112)
• 5d8cc07 Bump valid-directory from 3.0.0 to 3.2.0 (#1111)
• a8f1f12 Bump kava from 5.10.0 to 5.11.0 (#1110)
• f14ffee Bump ignorefs from 3.11.0 to 3.12.0 (#1109)
• Additional commits viewable in compare view

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[lubber-de]

Docs are currently not buildable using latest docpad, see #192

[dependabot[bot]]

Looks like these dependencies are no longer a dependency, so this is no longer needed.