Update inet.af/netaddr to a more recent version which supports go 1.18.
See: https://github.com/inetaf/netaddr/commit/c74959edd3b6ab3e864c55fd889ca8c13a835a81

--- a/go.mod
+++ b/go.mod
@@ -32,7 +32,7 @@ require (
 	golang.org/x/term v0.0.0-20210916214954-140adaaadfaf
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 	gotest.tools/v3 v3.0.3
-	inet.af/netaddr v0.0.0-20210903134321-85fa6c94624e
+	inet.af/netaddr v0.0.0-20211027220019-c74959edd3b6
 	k8s.io/client-go v0.22.2
 )
 
@@ -94,8 +94,8 @@ require (
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/xanzy/ssh-agent v0.3.1 // indirect
 	go.opencensus.io v0.23.0 // indirect
-	go4.org/intern v0.0.0-20210108033219-3eb7198706b2 // indirect
-	go4.org/unsafe/assume-no-moving-gc v0.0.0-20201222180813-1025295fd063 // indirect
+	go4.org/intern v0.0.0-20211027215823-ae77deb06f29 // indirect
+	go4.org/unsafe/assume-no-moving-gc v0.0.0-20211027215541-db492cf91b37 // indirect
 	golang.org/x/net v0.0.0-20210924151903-3ad01bbaa167 // indirect
 	golang.org/x/oauth2 v0.0.0-20210819190943-2bc19b11175f // indirect
 	golang.org/x/text v0.3.7 // indirect
--- a/go.sum
+++ b/go.sum
@@ -773,9 +773,13 @@ go.uber.org/zap v1.18.1/go.mod h1:xg/QME4nWcxGxrpdeYfq7UvYrLh66cuVKdrbD1XF/NI=
 go.uber.org/zap v1.19.0/go.mod h1:xg/QME4nWcxGxrpdeYfq7UvYrLh66cuVKdrbD1XF/NI=
 go4.org/intern v0.0.0-20210108033219-3eb7198706b2 h1:VFTf+jjIgsldaz/Mr00VaCSswHJrI2hIjQygE/W4IMg=
 go4.org/intern v0.0.0-20210108033219-3eb7198706b2/go.mod h1:vLqJ+12kCw61iCWsPto0EOHhBS+o4rO5VIucbc9g2Cc=
+go4.org/intern v0.0.0-20211027215823-ae77deb06f29 h1:UXLjNohABv4S58tHmeuIZDO6e3mHpW2Dx33gaNt03LE=
+go4.org/intern v0.0.0-20211027215823-ae77deb06f29/go.mod h1:cS2ma+47FKrLPdXFpr7CuxiTW3eyJbWew4qx0qtQWDA=
 go4.org/unsafe/assume-no-moving-gc v0.0.0-20201222175341-b30ae309168e/go.mod h1:FftLjUGFEDu5k8lt0ddY+HcrH/qU/0qk+H8j9/nTl3E=
 go4.org/unsafe/assume-no-moving-gc v0.0.0-20201222180813-1025295fd063 h1:1tk03FUNpulq2cuWpXZWj649rwJpk0d20rxWiopKRmc=
 go4.org/unsafe/assume-no-moving-gc v0.0.0-20201222180813-1025295fd063/go.mod h1:FftLjUGFEDu5k8lt0ddY+HcrH/qU/0qk+H8j9/nTl3E=
+go4.org/unsafe/assume-no-moving-gc v0.0.0-20211027215541-db492cf91b37 h1:Tx9kY6yUkLge/pFG7IEMwDZy6CS2ajFc9TvQdPCW0uA=
+go4.org/unsafe/assume-no-moving-gc v0.0.0-20211027215541-db492cf91b37/go.mod h1:FftLjUGFEDu5k8lt0ddY+HcrH/qU/0qk+H8j9/nTl3E=
 gocloud.dev v0.24.0 h1:cNtHD07zQQiv02OiwwDyVMuHmR7iQt2RLkzoAgz7wBs=
 gocloud.dev v0.24.0/go.mod h1:uA+als++iBX5ShuG4upQo/3Zoz49iIPlYUWHV5mM8w8=
 golang.org/x/crypto v0.0.0-20171113213409-9f005a07e0d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
@@ -1300,6 +1304,8 @@ honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 inet.af/netaddr v0.0.0-20210903134321-85fa6c94624e h1:tvgqez5ZQoBBiBAGNU/fmJy247yB/7++kcLOEoMYup0=
 inet.af/netaddr v0.0.0-20210903134321-85fa6c94624e/go.mod h1:z0nx+Dh+7N7CC8V5ayHtHGpZpxLQZZxkIaaz6HN65Ls=
+inet.af/netaddr v0.0.0-20211027220019-c74959edd3b6 h1:acCzuUSQ79tGsM/O50VRFySfMm19IoMKL+sZztZkCxw=
+inet.af/netaddr v0.0.0-20211027220019-c74959edd3b6/go.mod h1:y3MGhcFMlh0KZPMuXXow8mpjxxAk3yoDNsp4cQz54i8=
 k8s.io/api v0.22.2/go.mod h1:y3ydYpLJAaDI+BbSe2xmGcqxiWHmWjkEeIbiwHvnPR8=
 k8s.io/apimachinery v0.22.2/go.mod h1:O3oNtNadZdeOMxHFVxOreoznohCpy0z6mocxbZr7oJ0=
 k8s.io/client-go v0.22.2 h1:DaSQgs02aCC1QcwUdkKZWOeaVsQjYvWv8ZazcZ6JcHc=