feat: add type to context parameter on IAuthGuard

[micalevisk]

PR Checklist

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• The commit message follows our guidelines: https://github.com/nestjs/nest/blob/master/CONTRIBUTING.md
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Other... Please describe:

What is the current behavior?

as of now, the context parameter of handleRequest and getAuthenticateOptions methods is any

I'm pretty sure the type will always be ExecutionContext from @nestjs/common due to how those methods are invoked below:

passport/lib/auth.guard.ts

Lines 45 to 49 in ec086e4

	async canActivate(context: ExecutionContext): Promise<boolean> {
	const options = {
	...defaultOptions,
	...this.options,
	...(await this.getAuthenticateOptions(context))

passport/lib/auth.guard.ts

Line 60 in ec086e4

this.handleRequest(err, user, info, context, status)

What is the new behavior?

adds the type ExecutionContext to them, instead of any

Does this PR introduce a breaking change?

• Yes
• No