fix(deps): update dependency moment-timezone to v0.5.26

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
moment-timezone (source)	dependencies	patch	0.5.25 -> 0.5.26

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Release Notes

moment/moment-timezone

v0.5.26

Compare Source

• Updated data to IANA TZDB 2019b
• Fix: stabilize Array.sort #​762

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[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~30134 bytes removed 📉 [gzipped])

name              parsed_size            gzip_size
stats               -353312 B  (-32.6%)    -3761 B  (-2.0%)
settings-writing    -353312 B  (-43.1%)    -3768 B  (-3.2%)
settings            -353312 B  (-37.7%)    -3767 B  (-2.5%)
post-editor         -353312 B  (-16.0%)    -3770 B  (-0.7%)
help                -353312 B  (-39.4%)    -3767 B  (-2.7%)
concierge           -353312 B  (-58.3%)    -3768 B  (-5.8%)
comments            -353312 B  (-40.4%)    -3767 B  (-3.0%)
activity            -353312 B  (-46.6%)    -3766 B  (-3.6%)

Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Async-loaded Components (~15076 bytes removed 📉 [gzipped])

name                                   parsed_size            gzip_size
async-load-signup-steps-clone-point      -353312 B  (-68.3%)    -3769 B  (-9.0%)
async-load-design-blocks                 -353312 B  (-11.9%)    -3770 B  (-0.6%)
async-load-blocks-inline-help-popover    -353312 B  (-53.6%)    -3770 B  (-4.8%)
async-load-blocks-calendar-popover       -353312 B  (-60.0%)    -3767 B  (-7.5%)

React components that are loaded lazily, when a certain part of UI is displayed for the first time.

Legend

What is parsed and gzip size?

Parsed Size: Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory.
Gzip Size: Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.

[jsnajdr]

Updates the TZ data to the latest version. @sgomes will like the dramatic bundle size decrease 🙂

[sgomes]

@jsnajdr I do indeed! Woohoo, 3.7KB gone! :D That's probably the first time I've seen a timezone update bring the numbers down.

Which makes me very suspicious, of course. Especially with a patch release...
I'm not about to go audit timezone data, though, so let's just assume whatever data source they changed to just has less redundancy while maintaining correctness.

[sgomes]

@jsnajdr They switched from tzdb-2019a to tzdb-2019b. Going to the IANA website, tzdb-2019b appears to be larger, as I would expect from a timezone update.

I suspect we'll see a new moment-timezone soon, reinstating some missing data.

[sgomes]

@jsnajdr Some more evidence towards something being wrong here: moment/moment-timezone#768

I'd recommend rolling back, out of an abundance of caution.

[jsnajdr]

@sgomes I did some research into this, summarized in moment/moment-timezone#768 (comment)

TLDR:

• there is probably a real bug, but seems to affect only periods before 1910 and after 2037
• the smaller size of the packed data is expected

Let's continue watching the issue, but I think that revert is not needed at this moment.

[sgomes]

Sounds good, thank you for the thorough investigation, @jsnajdr ! 👍