Delete vendored code and update CI to Go 1.13 (#158)

As the Go community transitions to using the modules ecosystem,
we want to only support one way of managing dependencies.
So this change moves to only using Go modules for dependency management.

This means that our effective minimum Go version increases to Go 1.11.
To account for this, we also update:
  - the documentation
  - Makefile
  - CI scripts

1 files changed, 0 insertions, 179 deletions

diff --git a/vendor/golang.org/x/crypto/blake2b/blake2b_generic.go b/vendor/golang.org/x/crypto/blake2b/blake2b_generic.go
deleted file mode 100644
index 4bd2abc..0000000
--- a/vendor/golang.org/x/crypto/blake2b/blake2b_generic.go
+++ /dev/null
@@ -1,179 +0,0 @@
-// Copyright 2016 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package blake2b
-
-import "encoding/binary"
-
-// the precomputed values for BLAKE2b
-// there are 12 16-byte arrays - one for each round
-// the entries are calculated from the sigma constants.
-var precomputed = [12][16]byte{
-	{0, 2, 4, 6, 1, 3, 5, 7, 8, 10, 12, 14, 9, 11, 13, 15},
-	{14, 4, 9, 13, 10, 8, 15, 6, 1, 0, 11, 5, 12, 2, 7, 3},
-	{11, 12, 5, 15, 8, 0, 2, 13, 10, 3, 7, 9, 14, 6, 1, 4},
-	{7, 3, 13, 11, 9, 1, 12, 14, 2, 5, 4, 15, 6, 10, 0, 8},
-	{9, 5, 2, 10, 0, 7, 4, 15, 14, 11, 6, 3, 1, 12, 8, 13},
-	{2, 6, 0, 8, 12, 10, 11, 3, 4, 7, 15, 1, 13, 5, 14, 9},
-	{12, 1, 14, 4, 5, 15, 13, 10, 0, 6, 9, 8, 7, 3, 2, 11},
-	{13, 7, 12, 3, 11, 14, 1, 9, 5, 15, 8, 2, 0, 4, 6, 10},
-	{6, 14, 11, 0, 15, 9, 3, 8, 12, 13, 1, 10, 2, 7, 4, 5},
-	{10, 8, 7, 1, 2, 4, 6, 5, 15, 9, 3, 13, 11, 14, 12, 0},
-	{0, 2, 4, 6, 1, 3, 5, 7, 8, 10, 12, 14, 9, 11, 13, 15}, // equal to the first
-	{14, 4, 9, 13, 10, 8, 15, 6, 1, 0, 11, 5, 12, 2, 7, 3}, // equal to the second
-}
-
-func hashBlocksGeneric(h *[8]uint64, c *[2]uint64, flag uint64, blocks []byte) {
-	var m [16]uint64
-	c0, c1 := c[0], c[1]
-
-	for i := 0; i < len(blocks); {
-		c0 += BlockSize
-		if c0 < BlockSize {
-			c1++
-		}
-
-		v0, v1, v2, v3, v4, v5, v6, v7 := h[0], h[1], h[2], h[3], h[4], h[5], h[6], h[7]
-		v8, v9, v10, v11, v12, v13, v14, v15 := iv[0], iv[1], iv[2], iv[3], iv[4], iv[5], iv[6], iv[7]
-		v12 ^= c0
-		v13 ^= c1
-		v14 ^= flag
-
-		for j := range m {
-			m[j] = binary.LittleEndian.Uint64(blocks[i:])
-			i += 8
-		}
-
-		for j := range precomputed {
-			s := &(precomputed[j])
-
-			v0 += m[s[0]]
-			v0 += v4
-			v12 ^= v0
-			v12 = v12<<(64-32) | v12>>32
-			v8 += v12
-			v4 ^= v8
-			v4 = v4<<(64-24) | v4>>24
-			v1 += m[s[1]]
-			v1 += v5
-			v13 ^= v1
-			v13 = v13<<(64-32) | v13>>32
-			v9 += v13
-			v5 ^= v9
-			v5 = v5<<(64-24) | v5>>24
-			v2 += m[s[2]]
-			v2 += v6
-			v14 ^= v2
-			v14 = v14<<(64-32) | v14>>32
-			v10 += v14
-			v6 ^= v10
-			v6 = v6<<(64-24) | v6>>24
-			v3 += m[s[3]]
-			v3 += v7
-			v15 ^= v3
-			v15 = v15<<(64-32) | v15>>32
-			v11 += v15
-			v7 ^= v11
-			v7 = v7<<(64-24) | v7>>24
-
-			v0 += m[s[4]]
-			v0 += v4
-			v12 ^= v0
-			v12 = v12<<(64-16) | v12>>16
-			v8 += v12
-			v4 ^= v8
-			v4 = v4<<(64-63) | v4>>63
-			v1 += m[s[5]]
-			v1 += v5
-			v13 ^= v1
-			v13 = v13<<(64-16) | v13>>16
-			v9 += v13
-			v5 ^= v9
-			v5 = v5<<(64-63) | v5>>63
-			v2 += m[s[6]]
-			v2 += v6
-			v14 ^= v2
-			v14 = v14<<(64-16) | v14>>16
-			v10 += v14
-			v6 ^= v10
-			v6 = v6<<(64-63) | v6>>63
-			v3 += m[s[7]]
-			v3 += v7
-			v15 ^= v3
-			v15 = v15<<(64-16) | v15>>16
-			v11 += v15
-			v7 ^= v11
-			v7 = v7<<(64-63) | v7>>63
-
-			v0 += m[s[8]]
-			v0 += v5
-			v15 ^= v0
-			v15 = v15<<(64-32) | v15>>32
-			v10 += v15
-			v5 ^= v10
-			v5 = v5<<(64-24) | v5>>24
-			v1 += m[s[9]]
-			v1 += v6
-			v12 ^= v1
-			v12 = v12<<(64-32) | v12>>32
-			v11 += v12
-			v6 ^= v11
-			v6 = v6<<(64-24) | v6>>24
-			v2 += m[s[10]]
-			v2 += v7
-			v13 ^= v2
-			v13 = v13<<(64-32) | v13>>32
-			v8 += v13
-			v7 ^= v8
-			v7 = v7<<(64-24) | v7>>24
-			v3 += m[s[11]]
-			v3 += v4
-			v14 ^= v3
-			v14 = v14<<(64-32) | v14>>32
-			v9 += v14
-			v4 ^= v9
-			v4 = v4<<(64-24) | v4>>24
-
-			v0 += m[s[12]]
-			v0 += v5
-			v15 ^= v0
-			v15 = v15<<(64-16) | v15>>16
-			v10 += v15
-			v5 ^= v10
-			v5 = v5<<(64-63) | v5>>63
-			v1 += m[s[13]]
-			v1 += v6
-			v12 ^= v1
-			v12 = v12<<(64-16) | v12>>16
-			v11 += v12
-			v6 ^= v11
-			v6 = v6<<(64-63) | v6>>63
-			v2 += m[s[14]]
-			v2 += v7
-			v13 ^= v2
-			v13 = v13<<(64-16) | v13>>16
-			v8 += v13
-			v7 ^= v8
-			v7 = v7<<(64-63) | v7>>63
-			v3 += m[s[15]]
-			v3 += v4
-			v14 ^= v3
-			v14 = v14<<(64-16) | v14>>16
-			v9 += v14
-			v4 ^= v9
-			v4 = v4<<(64-63) | v4>>63
-
-		}
-
-		h[0] ^= v0 ^ v8
-		h[1] ^= v1 ^ v9
-		h[2] ^= v2 ^ v10
-		h[3] ^= v3 ^ v11
-		h[4] ^= v4 ^ v12
-		h[5] ^= v5 ^ v13
-		h[6] ^= v6 ^ v14
-		h[7] ^= v7 ^ v15
-	}
-	c[0], c[1] = c0, c1
-}