Bump gopkg.in/yaml.v2 to v2.4.0: fixes inconsistent long lines wrapping

Calls the FutureLineWrap function to globally disable lines wrapping in unit tests.

.gitignore

@@ -6,6 +6,10 @@
 .project
 .settings/**
 
+# Idea files
+.idea/**
+.idea/
+
 # Emacs save files
 *~
 

go.mod

@@ -4,5 +4,5 @@ go 1.12
 
 require (
 	github.com/davecgh/go-spew v1.1.1
-	gopkg.in/yaml.v2 v2.2.8
+	gopkg.in/yaml.v2 v2.4.0
 )

go.sum

@@ -2,5 +2,5 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
-gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=

vendor/modules.txt

@@ -1,4 +1,4 @@
 # github.com/davecgh/go-spew v1.1.1
 github.com/davecgh/go-spew/spew
-# gopkg.in/yaml.v2 v2.2.8
+# gopkg.in/yaml.v2 v2.4.0
 gopkg.in/yaml.v2

yaml_test.go

@@ -271,6 +271,10 @@ func TestJSONToYAML(t *testing.T) {
 			`{"t":null}`,
 			"t: null\n",
 			nil,
+		},{
+			`{"t":"this is very long line with spaces and it must be longer than 80 so we will repeat that it must be longer that 80"}`,
+			"t: this is very long line with spaces and it must be longer than 80 so we will repeat\n  that it must be longer that 80\n",
+			nil,
 		},
 	}