fix go build for Go 1.18 on macOS m1

[chai2010]

macbook-m1:gocity chai$ go version
go version go1.18.2 darwin/arm64
macbook-m1:gocity chai$ go run main.go 
# golang.org/x/sys/unix
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/syscall_darwin.1_13.go:29:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.1_13.go:27:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.1_13.go:40:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.go:28:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.go:43:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.go:59:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.go:75:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.go:90:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.go:105:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.go:121:3: //go:linkname must refer to declared function or variable
../../../../pkg/mod/golang.org/x/sys@v0.0.0-20201029080932-201ba4db2418/unix/zsyscall_darwin_arm64.go:121:3: too many errors

[codecov-commenter]

Codecov Report

Base: 97.01% // Head: 97.01% // No change to project coverage 👍

Coverage data is based on head (dccccbf) compared to base (871c035).
Patch has no changes to coverable lines.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #82   +/-   ##
=======================================
  Coverage   97.01%   97.01%           
=======================================
  Files           8        8           
  Lines         201      201           
=======================================
  Hits          195      195           
  Misses          4        4           
  Partials        2        2           

Flag	Coverage Δ
unittests	97.01% <ø> (ø)

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[rodrigo-brito]

Thank you for the contribution @chai2010 👏🏻