Update supported browsers

[nrenner]

Currently supported browser are defined by this Browserslist query which is used by Babel, ESLint, Autoprefixer and PostCSS:

brouter-web/package.json

Lines 24 to 34 in 4c2e390

	"browserslist": [
	"> 0.5%",
	"last 2 versions",
	"Firefox ESR",
	"Firefox >= 56",
	"not dead",
	"Explorer >= 10",
	"Android >= 4.1",
	"Safari >= 7",
	"iOS >= 7"
	],

The query is composed of:

• > 0.5%, last 2 versions, Firefox ESR, not dead - the Browserslist defaults query
• Firefox >= 56 - still in use because of support for old plugins before Web Extensions (#571)
• Explorer >= 10, Android >= 4.1, Safari >= 7, iOS >= 7 - minimal versions to support Flexbox (source)

Quoting @tbsmark86 from #621:

Safari 7, op_mini all, IE 10, android 4.1 don't seem relevant today. Those are all EOL maybe eslint configuration should be updated?

The versions Explorer >= 10, Android >= 4.1, Safari >= 7, iOS >= 7 were the minimal required when we introduced Flexbox and Autoprefixer. That part could probably be dropped nowadays.

And supporting opera-mini seems pointless.

The Browserslist definition does not consider it dead yet, still covered by the defaults (Opera Mini all: 0.95 %).

It would be nice to get custom usage data from User-Agent strings in Nginx log, but there only seem to be tools for Google Analytics & co.

[tbsmark86]

The Browserslist definition does not consider it dead yet, still covered by the defaults (Opera Mini all: 0.95 %).

I agree. Opera Mini is not dead. What I meant was that Opera Mini has very limited supported for interactive websites because, as far as I now, most of the rendering is done on the server.

The versions Explorer >= 10,

Not sure if you know but IE 11 has reached EOL a few month ago. So drop IE.

Android >= 4.1,

Hm not sure at which to jump but starting 2024 Android < 7.1 will fail because of Lets-Encrypt.
Probably let the browserlist default decide.

Safari >= 7, iOS >= 7

Not sure about safari but iOS can be at least >= 9. Because apple does update so well an ios 8 device would be more then 10 years old.