Reduce package installation size

[GaelGirodon]

The current installation size of the package may discourage its integration into other projects or packages that want to keep their size as low as possible (as mentioned in #687).

The installation size has increased significantly over releases, especially on 2.x, 5.x and 7.x:

1.15.2	2.1.0	3.1.0	4.3.0	5.3.0	6.2.5	7.2.3
1.38 MB	3.01 MB	3.01 MB	3.89 MB	10.5 MB	10.7 MB	16.3 MB

→ https://packagephobia.com/result?p=zx%401.15.2%2Czx%402.1.0%2Czx%403.1.0%2Czx%404.3.0%2Czx%405.3.0%2Czx%406.2.5%2Czx%407.2.3

98% of the installation size comes from 5 dependencies:

Dependency	Install	%
node-fetch	7.45 MB	47 %
@types/node	3.50 MB	22 %
@types/fs-extra	3.45 MB	22 %
yaml	636 kB	4 %
globby	577 kB	4 %
ps-tree	131 kB	1 %
fs-extra	114 kB	1 %
minimist	53.2 kB	0 %
chalk	42.5 kB	0 %
fx	19.5 kB	0 %
which	17.7 kB	0 %
@types/minimist	7.17 kB	0 %
@types/which	5.26 kB	0 %
@types/ps-tree	4.45 kB	0 %
webpod	357 B	0 %

→ https://packagephobia.com/result?p=@types/[email protected],@types/[email protected],@types/[email protected],@types/[email protected],@types/[email protected],[email protected],[email protected],fx,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected]

The package size could be drastically reduced (-90%) by:

1. Removing node-fetch (Drop Node.js v16 and node-fetch dependency #687, Plan for v8 #589): -47%
2. Moving @types/* to dev (and optional?) dependencies: -44%
   • These types can still be installed if needed by TypeScript users
3. Removing fs-extra and @types/fs-extra (Plan for v8 #589): -22%

Tasks 1 and 3 are already planned for v8, could you consider the 2nd one as well? Thanks 🙂

[antonmedv]

Moving @types/* to dev (and optional?) dependencies: -44%
These types can still be installed if needed by TypeScript users

Yeap. We are going to build zx with esbuild and we can build .d.ts as well.

[antongolub]

Good news. We have a proposal, that reaches the 414Kb point (4.33MB with optional @types/fs-extra and @types/node)
https://packagephobia.com/result?p=%40antongolub%2Fzx%2C+zx

[antonmedv]

🎉 Awesome work @antongolub