Can't install v1.x on Laravel 7.x

[riaanduplessis]

Describe the bug
The dependencies of version 1.x require either version 6 or 8 of various illuminate packages.

Since those illuminate packages are on version 7 when Laravel is also on 7, composer cannot install this package.

Impacted Versions

v1.x

Additional context

psalm-plugin-laravel/composer.json

Lines 16 to 24 in 8c46a82

	"illuminate/config": "^6.0 || ^8.0",
	"illuminate/container": "^6.0 || ^8.0",
	"illuminate/contracts": "^6.0 || ^8.0",
	"illuminate/database": "^6.0 || ^8.0",
	"illuminate/events": "^6.0 || ^8.0",
	"illuminate/http": "^6.0 || ^8.0",
	"illuminate/routing": "^6.0 || ^8.0",
	"illuminate/support": "^6.0 || ^8.0",
	"illuminate/view": "^6.0 || ^8.0",

[mr-feek]

support for Laravel 7 was dropped in 1.5.0 as Laravel 7 reached end of life (#185)

Use v1.4.9 of this package.