Integration folder `ckeditor5*` peerDeps not updated by release script

[f1ames]

As mentioned in the issue title. The peerDeps should be updated too in integrations folder package.json, to be aligned with ckeditor5* package version from samples directories.

[Dumluregn]

Stylesheets versions in exports configs are also static:

ckeditor5-collaboration-samples/real-time-collaboration-for-angular/src/app/app.component.ts

Lines 310 to 329 in 1b5d600

	stylesheets: [
	'https://cdn.ckeditor.com/ckeditor5/42.0.0/ckeditor5.css',
	'https://cdn.ckeditor.com/ckeditor5-premium-features/42.0.0/ckeditor5-premium-features.css'
	],
	fileName: 'export-pdf-demo.pdf',
	appID: 'cke5-demos',
	converterOptions: {
	format: 'Tabloid',
	margin_top: '20mm',
	margin_bottom: '20mm',
	margin_right: '24mm',
	margin_left: '24mm',
	page_orientation: 'portrait'
	},
	tokenUrl: false
	},
	exportWord: {
	stylesheets: [
	'https://cdn.ckeditor.com/ckeditor5/42.0.0/ckeditor5.css',
	'https://cdn.ckeditor.com/ckeditor5-premium-features/42.0.0/ckeditor5-premium-features.css'

(probably in other demos as well).