Deps update, gopkg.lock fix, flagger initialization fix.

vendor/golang.org/x/crypto/xtea/block.go

@@ -50,7 +50,7 @@ func encryptBlock(c *Cipher, dst, src []byte) {
 	uint32ToBlock(v0, v1, dst)
 }
 
-// decryptBlock decrypt a single 8 byte block using XTEA.
+// decryptBlock decrypts a single 8 byte block using XTEA.
 func decryptBlock(c *Cipher, dst, src []byte) {
 	v0, v1 := blockToUint32(src)
 

vendor/golang.org/x/crypto/xtea/cipher.go

@@ -4,6 +4,14 @@
 
 // Package xtea implements XTEA encryption, as defined in Needham and Wheeler's
 // 1997 technical report, "Tea extensions."
+//
+// XTEA is a legacy cipher and its short block size makes it vulnerable to
+// birthday bound attacks (see https://sweet32.info). It should only be used
+// where compatibility with legacy systems, not security, is the goal.
+//
+// Deprecated: any new system should use AES (from crypto/aes, if necessary in
+// an AEAD mode like crypto/cipher.NewGCM) or XChaCha20-Poly1305 (from
+// golang.org/x/crypto/chacha20poly1305).
 package xtea // import "golang.org/x/crypto/xtea"
 
 // For details, see http://www.cix.co.uk/~klockstone/xtea.pdf
@@ -14,8 +22,8 @@ import "strconv"
 const BlockSize = 8
 
 // A Cipher is an instance of an XTEA cipher using a particular key.
-// table contains a series of precalculated values that are used each round.
 type Cipher struct {
+	// table contains a series of precalculated values that are used each round.
 	table [64]uint32
 }
 
@@ -54,7 +62,7 @@ func (c *Cipher) BlockSize() int { return BlockSize }
 // instead, use an encryption mode like CBC (see crypto/cipher/cbc.go).
 func (c *Cipher) Encrypt(dst, src []byte) { encryptBlock(c, dst, src) }
 
-// Decrypt decrypts the 8 byte buffer src using the key k and stores the result in dst.
+// Decrypt decrypts the 8 byte buffer src using the key and stores the result in dst.
 func (c *Cipher) Decrypt(dst, src []byte) { decryptBlock(c, dst, src) }
 
 // initCipher initializes the cipher context by creating a look up table