Update module lib/pq to v1.6.0 (#572)

Update module lib/pq to v1.6.0

Reviewed-on: https://kolaente.dev/vikunja/api/pulls/572

vendor/github.com/jcmturner/gokrb5/v8/iana/flags/constants.go

@@ -0,0 +1,36 @@
+// Package flags provides Kerberos 5 flag assigned numbers.
+package flags
+
+// Flag values for KRB5 messages and tickets.
+const (
+	Reserved               = 0
+	Forwardable            = 1
+	Forwarded              = 2
+	Proxiable              = 3
+	Proxy                  = 4
+	AllowPostDate          = 5
+	MayPostDate            = 5
+	PostDated              = 6
+	Invalid                = 7
+	Renewable              = 8
+	Initial                = 9
+	PreAuthent             = 10
+	HWAuthent              = 11
+	OptHardwareAuth        = 11
+	RequestAnonymous       = 12
+	TransitedPolicyChecked = 12
+	OKAsDelegate           = 13
+	EncPARep               = 15
+	Canonicalize           = 15
+	DisableTransitedCheck  = 26
+	RenewableOK            = 27
+	EncTktInSkey           = 28
+	Renew                  = 30
+	Validate               = 31
+
+	// AP Option Flags
+	// 0 Reserved for future use.
+	APOptionUseSessionKey  = 1
+	APOptionMutualRequired = 2
+	// 3-31 Reserved for future use.
+)