bump x/crypto dependency

vendor/golang.org/x/crypto/sha3/xor_unaligned.go

@@ -16,15 +16,6 @@ func (b *storageBuf) asBytes() *[maxRate]byte {
 	return (*[maxRate]byte)(unsafe.Pointer(b))
 }
 
-//go:nocheckptr
-//
-// xorInUnaligned intentionally reads the input buffer as an unaligned slice of
-// integers. The language spec is not clear on whether that is allowed.
-// See:
-// 	https://golang.org/issue/37644
-// 	https://golang.org/issue/37298
-// 	https://golang.org/issue/35381
-
 // xorInUnaligned uses unaligned reads and writes to update d.a to contain d.a
 // XOR buf.
 func xorInUnaligned(d *state, buf []byte) {

vendor/modules.txt

@@ -52,7 +52,7 @@ github.com/tidwall/tinyqueue
 # github.com/toorop/go-dkim v0.0.0-20200526084421-76378ae5207e
 ## explicit
 github.com/toorop/go-dkim
-# golang.org/x/crypto v0.0.0-20200709230013-948cd5f35899
+# golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a
 ## explicit
 golang.org/x/crypto/bcrypt
 golang.org/x/crypto/blowfish