go.mod: golang_protobuf_extensions v1.0.4 - prevent incompat versions

This module made a whoopsie, and updated to `google.golang.org/protobuf`
in a patch release, but `google.golang.org/protobuf` is not backward
compatible with `github.com/golang/protobuf`.

Updating the minimum version to v1.0.4 which corrects this, to prevent
users of buildx as a module from accidentally pulling in the wrong
version:

- v1.0.3 switched to use `google.golang.org/protobuf`; https://github.com/matttproud/golang_protobuf_extensions/compare/v1.0.2..v1.0.3
- This was reverted in v1.0.4 (which is the same as v1.0.2); https://github.com/matttproud/golang_protobuf_extensions/compare/v1.0.3..v1.0.4
- And a `v2` was created instead; https://github.com/matttproud/golang_protobuf_extensions/releases/tag/v2.0.0

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

go.mod

@@ -110,7 +110,7 @@ require (
 	github.com/klauspost/compress v1.15.12 // indirect
 	github.com/kr/pretty v0.3.0 // indirect
 	github.com/mattn/go-shellwords v1.0.12 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.2 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
 	github.com/miekg/pkcs11 v1.1.1 // indirect
 	github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect

go.sum

@@ -393,8 +393,8 @@ github.com/mailru/easyjson v0.0.0-20190626092158-b2ccc519800e/go.mod h1:C1wdFJiN
 github.com/mattn/go-shellwords v1.0.12 h1:M2zGm7EW6UQJvDeQxo4T51eKPurbeFbe8WtebGE2xrk=
 github.com/mattn/go-shellwords v1.0.12/go.mod h1:EZzvwXDESEeg03EKmM+RmDnNOPKG4lLtQsUlTZDWQ8Y=
 github.com/matttproud/golang_protobuf_extensions v1.0.1/go.mod h1:D8He9yQNgCq6Z5Ld7szi9bcBfOoFv/3dc6xSMkL2PC0=
-github.com/matttproud/golang_protobuf_extensions v1.0.2 h1:hAHbPm5IJGijwng3PWk09JkG9WeqChjprR5s9bBZ+OM=
-github.com/matttproud/golang_protobuf_extensions v1.0.2/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
+github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
+github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
 github.com/miekg/pkcs11 v1.1.1 h1:Ugu9pdy6vAYku5DEpVWVFPYnzV+bxB+iRdbuFSu7TvU=
 github.com/miekg/pkcs11 v1.1.1/go.mod h1:XsNlhZGX73bx86s2hdc/FuaLm2CPZJemRLMA+WTFxgs=
 github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=

vendor/modules.txt

@@ -421,7 +421,7 @@ github.com/klauspost/compress/zstd/internal/xxhash
 # github.com/mattn/go-shellwords v1.0.12
 ## explicit; go 1.13
 github.com/mattn/go-shellwords
-# github.com/matttproud/golang_protobuf_extensions v1.0.2
+# github.com/matttproud/golang_protobuf_extensions v1.0.4
 ## explicit; go 1.9
 github.com/matttproud/golang_protobuf_extensions/pbutil
 # github.com/miekg/pkcs11 v1.1.1