driver: resolve BuildKit version for docker driver

Buildx currently returns the Docker Engine version for the docker driver
and it can be confusing. This is because BuildKit before 0.11 version does
not support the Info API that returns the BuildKit version.

This change resolves the BuildKit version from the Docker engine one.

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/Masterminds/semver/v3/Makefile

@@ -0,0 +1,37 @@
+GOPATH=$(shell go env GOPATH)
+GOLANGCI_LINT=$(GOPATH)/bin/golangci-lint
+GOFUZZBUILD = $(GOPATH)/bin/go-fuzz-build
+GOFUZZ = $(GOPATH)/bin/go-fuzz
+
+.PHONY: lint
+lint: $(GOLANGCI_LINT)
+	@echo "==> Linting codebase"
+	@$(GOLANGCI_LINT) run
+
+.PHONY: test
+test:
+	@echo "==> Running tests"
+	GO111MODULE=on go test -v
+
+.PHONY: test-cover
+test-cover:
+	@echo "==> Running Tests with coverage"
+	GO111MODULE=on go test -cover .
+
+.PHONY: fuzz
+fuzz: $(GOFUZZBUILD) $(GOFUZZ)
+	@echo "==> Fuzz testing"
+	$(GOFUZZBUILD)
+	$(GOFUZZ) -workdir=_fuzz
+
+$(GOLANGCI_LINT):
+	# Install golangci-lint. The configuration for it is in the .golangci.yml
+	# file in the root of the repository
+	echo ${GOPATH}
+	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(GOPATH)/bin v1.17.1
+
+$(GOFUZZBUILD):
+	cd / && go get -u github.com/dvyukov/go-fuzz/go-fuzz-build
+
+$(GOFUZZ):
+	cd / && go get -u github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-dep