vendor: update all dependencies to latest versions

vendor/gopkg.in/yaml.v2/decode_test.go

@@ -438,6 +438,9 @@ var unmarshalTests = []struct {
 	{
 		"foo: ''",
 		map[string]*string{"foo": new(string)},
+	}, {
+		"foo: null",
+		map[string]*string{"foo": nil},
 	}, {
 		"foo: null",
 		map[string]string{"foo": ""},
@@ -446,6 +449,18 @@ var unmarshalTests = []struct {
 		map[string]interface{}{"foo": nil},
 	},
 
+	// Support for ~
+	{
+		"foo: ~",
+		map[string]*string{"foo": nil},
+	}, {
+		"foo: ~",
+		map[string]string{"foo": ""},
+	}, {
+		"foo: ~",
+		map[string]interface{}{"foo": nil},
+	},
+
 	// Ignored field
 	{
 		"a: 1\nb: 2\n",
@@ -984,7 +999,7 @@ func (s *S) TestUnmarshalStrict(c *C) {
 	err = yaml.Unmarshal([]byte("a: 1\nb: 2\nc: 3"), &v)
 	c.Check(err, IsNil)
 	err = yaml.UnmarshalStrict([]byte("a: 1\nb: 2\nc: 3"), &v)
-	c.Check(err, ErrorMatches, "yaml: unmarshal errors:\n  line 1: field c not found in struct struct { A int; B int }")
+	c.Check(err, ErrorMatches, "yaml: unmarshal errors:\n  line 3: field c not found in struct struct { A int; B int }")
 }
 
 //var data []byte