Upgrade versions of vendored libs

vendor/github.com/cockroachdb/pebble/internal/arenaskl/flush_iterator.go

@@ -79,6 +79,10 @@ func (it *flushIterator) Next() (*base.InternalKey, base.LazyValue) {
 	return &it.key, base.MakeInPlaceValue(it.value())
 }
 
+func (it *flushIterator) NextPrefix(succKey []byte) (*base.InternalKey, base.LazyValue) {
+	panic("pebble: NextPrefix unimplemented")
+}
+
 func (it *flushIterator) Prev() (*base.InternalKey, base.LazyValue) {
 	panic("pebble: Prev unimplemented")
 }

vendor/github.com/cockroachdb/pebble/internal/arenaskl/iterator.go

@@ -194,6 +194,13 @@ func (it *Iterator) Next() (*base.InternalKey, base.LazyValue) {
 	return &it.key, base.MakeInPlaceValue(it.value())
 }
 
+// NextPrefix advances to the next position with a new prefix. Returns the key
+// and value if the iterator is pointing at a valid entry, and (nil, nil)
+// otherwise.
+func (it *Iterator) NextPrefix(succKey []byte) (*base.InternalKey, base.LazyValue) {
+	return it.SeekGE(succKey, base.SeekGEFlagsNone.EnableTrySeekUsingNext())
+}
+
 // Prev moves to the previous position. Returns the key and value if the
 // iterator is pointing at a valid entry, and (nil, nil) otherwise.
 func (it *Iterator) Prev() (*base.InternalKey, base.LazyValue) {

vendor/github.com/cockroachdb/pebble/internal/arenaskl/skl.go

@@ -68,7 +68,7 @@ const (
 // keys.
 var ErrRecordExists = errors.New("record with this key already exists")
 
-// Skiplist is a fast, cocnurrent skiplist implementation that supports forward
+// Skiplist is a fast, concurrent skiplist implementation that supports forward
 // and backward iteration. See batchskl.Skiplist for a non-concurrent
 // skiplist. Keys and values are immutable once added to the skiplist and
 // deletion is not supported. Instead, higher-level code is expected to add new