Update dependencies

[mstoykov]

This became a lot bigger than anticipated ... Especially the x/ updates are quite big 🤞
There is slight update on all, but in most cases it is "nothing interesting to us" or "small optimizations here and there" except the x/* ones where I skipped that as the changelog is quite big and only in commit messages ;(

Skipped upgrades:

• cobra - there is nothing we care about IMO it updates proto/grpc libraries 🤦
• color/istty and co. - there are some changes between the repositories and it seems there will be more releases soon - next few days
• goquery - adds new functionality that we will need to update k6/html so decided to skip it for now, maybe an issue needs to be opened
• goja - there is an issue with some of our current k6/crypto/x509 code that is being looked after in ExportTo throws error from string to []byte dop251/goja#333

[na--]

LGTM, with a minor nitpick. It's nice to see that golang.org/x/crypto/ssh/terminal has finally been replaced with golang.org/x/term:

k6/vendor/golang.org/x/crypto/ssh/terminal/terminal.go

Lines 8 to 23 in 5c25ef3

	// Deprecated: this package moved to golang.org/x/term.
	package terminal
	import (
	"io"
	"golang.org/x/term"
	)
	// EscapeCodes contains escape sequences that can be written to the terminal in
	// order to achieve different styles of text.
	type EscapeCodes = term.EscapeCodes
	// Terminal contains the state for running a VT100 terminal that is capable of
	// reading lines of input.
	type Terminal = term.Terminal

We should probably replace our own usage of the original package and drop the module entirely with this update, it seems fairly straightforward to do: https://github.com/grafana/k6/search?q=golang.org%2Fx%2Fcrypto%2Fssh%2Fterminal

[yorugac]

@mstoykov regarding this:

goquery - adds new functionality that we will need to update k6/html so decided to skip it for now, maybe an issue needs to be opened

what functionality is it?

[mstoykov]

@yorugac

2021-06-14 (v1.7.0) : Add Single and SingleMatcher functions to optimize first-match selection (thanks @gdollardollar).