CB-14230 patch release 5.0.4

[brodybits]

Platforms affected

browser

What does this PR do?

• Update RELEASENOTES.md with the most important changes for 5.0.3 (was forgotten in the 5.0.3 release)
• Update RELEASENOTES.md with the most important changes for 5.0.4
• Update JS snapshot, VERSION, and version to 5.0.4 on 5.0.x branch using the following command with updates from apache/cordova-coho#176: ./cordova-coho/coho prepare-platform-release-branch --version 5.0.4 -r browser 5.0.x

This release includes the following changes:

• CB-9366 - log error.stack in cordova.js (update from cordova-js@4.2.4) in 5.0.x (ef012e389996d27f580063a7b271f2ae08c484e9)
• add Node.js 10 to AppVeyor CI and Travis CI in 5.0.x (57fdfc8735f6aa5b91b397f7822180ea86bdb0bf)
• CB-14145 update dependencies to resolve npm audit issues, pinned in 5.0.x only (GH-53)
• GH-54 - pin more added bundled dependencies in 5.0.x only (needed to clear the red highlights in npm outdated --depth=0)
• GH-56 - pin even more added bundled dependencies in 5.0.x only, needed to clear a few more red highlights in npm outdated --depth=0

What testing has been done on this change?

• [x] npm audit shows 0 vulnerabilities (using npm@6.2.0)
• [x] npm outdated --depth=0 shows no red entries
• [x] coho audit-license-headers -r browser shows no missing license headers
• [x] coho check-license -r browser shows no incorrect licenses _(NOTE: this patch release now includes xmldom package which does not have correct SPDX expression; however, visual inspection of node_modules/xmldom/LICENSE shows MIT license option, which is acceptable.)_
• [x] npm test succeeds on local machine
• [x] npm test succeeds on AppVeyor CI & Travis CI
• [x] able to add to https://github.com/brodybits/cordova-dialogs-bootstrap-test using cordova platform add github:brodybits/cordova-browser#5.0.x, run, and try a couple dialogs with npm@2.15.11 (bundled with deprecated node v4.9.1) on Windows Edge, Windows Chrome, and macOS Safari
• [x] able to add to https://github.com/brodybits/cordova-dialogs-bootstrap-test using cordova platform add github:brodybits/cordova-browser#5.0.x, run, and try a couple dialogs with npm@5.6.0 (bundled with node v8.11.3)

Checklist

• Reported an issue in the JIRA database
• [x] Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected. (manual changes only)
• Added automated test coverage as appropriate for this change.

[janpio]

Update RELEASENOTES.md with major changes for 5.0.4

major changes? Typo?

[brodybits]

major changes? Typo?

Reworded to "most important changes" in the description.