update README.md to match the new version

[typestring]

The readme is outdated

it still mentions tss.SetCurve which is marked as deprecated

tss-lib/tss/curve.go

Lines 68 to 70 in d5a7e79

	// SetCurve sets the curve used by TSS. Must be called before Start. The default is secp256k1
	// Deprecated
	func SetCurve(curve elliptic.Curve) {

and also when calling tss.NewParameters the curve must be passed

tss-lib/tss/params.go

Line 85 in d5a7e79

func NewReSharingParameters(ec elliptic.Curve, ctx, newCtx *PeerContext, partyID *PartyID, partyCount, threshold, newPartyCount, newThreshold int) *ReSharingParameters {