Switch git-todo-parser from fsmiamoto original repo to stefanhaller's fork

Sometimes it takes a while to get PRs accepted upstream, and this blocks our
progress. Since I'm pretty much the only one making changes there anyway, it
makes sense to point to my fork directly.

vendor/github.com/stefanhaller/git-todo-parser/todo/todo.go

@@ -0,0 +1,78 @@
+package todo
+
+type TodoCommand int
+
+const (
+	Pick TodoCommand = iota + 1
+	Revert
+	Edit
+	Reword
+	Fixup
+	Squash
+
+	Exec
+	Break
+	Label
+	Reset
+	Merge
+
+	NoOp
+	Drop
+	UpdateRef
+
+	Comment
+)
+
+type Todo struct {
+	Command     TodoCommand
+	Commit      string
+	Flag        string
+	Comment     string
+	ExecCommand string
+	Label       string
+	Msg         string
+	Ref         string
+}
+
+func (t TodoCommand) String() string {
+	return commandToString[t]
+}
+
+var commandToString = map[TodoCommand]string{
+	Pick:      "pick",
+	Revert:    "revert",
+	Edit:      "edit",
+	Reword:    "reword",
+	Fixup:     "fixup",
+	Squash:    "squash",
+	Exec:      "exec",
+	Break:     "break",
+	Label:     "label",
+	Reset:     "reset",
+	Merge:     "merge",
+	NoOp:      "noop",
+	Drop:      "drop",
+	UpdateRef: "update-ref",
+	Comment:   "comment",
+}
+
+var todoCommandInfo = [15]struct {
+	nickname string
+	cmd      string
+}{
+	{"", ""}, // dummy value since we're using 1-based indexing
+	{"p", "pick"},
+	{"", "revert"},
+	{"e", "edit"},
+	{"r", "reword"},
+	{"f", "fixup"},
+	{"s", "squash"},
+	{"x", "exec"},
+	{"b", "break"},
+	{"l", "label"},
+	{"t", "reset"},
+	{"m", "merge"},
+	{"", "noop"},
+	{"d", "drop"},
+	{"u", "update-ref"},
+}