Update gomod and vendor

vendor/github.com/moby/buildkit/cache/remotecache/v1/spec.go

@@ -0,0 +1,35 @@
+package cacheimport
+
+import (
+	"time"
+
+	digest "github.com/opencontainers/go-digest"
+)
+
+const CacheConfigMediaTypeV0 = "application/vnd.buildkit.cacheconfig.v0"
+
+type CacheConfig struct {
+	Layers  []CacheLayer  `json:"layers,omitempty"`
+	Records []CacheRecord `json:"records,omitempty"`
+}
+
+type CacheLayer struct {
+	Blob        digest.Digest `json:"blob,omitempty"`
+	ParentIndex int           `json:"parent,omitempty"`
+}
+
+type CacheRecord struct {
+	Results []CacheResult  `json:"layers,omitempty"`
+	Digest  digest.Digest  `json:"digest,omitempty"`
+	Inputs  [][]CacheInput `json:"inputs,omitempty"`
+}
+
+type CacheResult struct {
+	LayerIndex int       `json:"layer"`
+	CreatedAt  time.Time `json:"createdAt,omitempty"`
+}
+
+type CacheInput struct {
+	Selector  string `json:"selector,omitempty"`
+	LinkIndex int    `json:"link"`
+}