*: mage, drop go1.1{5,6}, module updates, drop vendor

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>

mage_color.go

@@ -0,0 +1,28 @@
+//go:build mage
+// +build mage
+
+package main
+
+import (
+	"io"
+	"os"
+
+	"github.com/fatih/color"
+)
+
+var (
+	ourStdout = cw{c: color.New(color.FgGreen), o: os.Stdout}
+	ourStderr = cw{c: color.New(color.FgRed), o: os.Stderr}
+)
+
+// hack around color.Color not implementing Write()
+type cw struct {
+	c *color.Color
+	o io.Writer
+}
+
+func (cw cw) Write(p []byte) (int, error) {
+	i := len(p)
+	_, err := cw.c.Fprint(cw.o, string(p)) // discarding the number of bytes written for now...
+	return i, err
+}