Implement PR closing and reopening (#304)

Implement pull request closing/reopening

Signed-off-by: Martin Reboredo <yakoyoku@gmail.com>

Correct year and `pull` description

Apply changes from #291

Return fmt.Errorf instead of log.Fatal if no pull index was supplied

Co-authored-by: Martin Reboredo <yakoyoku@gmail.com>
Reviewed-on: https://gitea.com/gitea/tea/pulls/304
Reviewed-by: Norwin <noerw@noreply.gitea.io>
Reviewed-by: appleboy <appleboy.tw@gmail.com>
Co-Authored-By: Martin Reboredo <yakoyakoyokuyoku@noreply.gitea.io>
Co-Committed-By: Martin Reboredo <yakoyakoyokuyoku@noreply.gitea.io>

cmd/pulls.go

@@ -21,8 +21,8 @@ import (
 var CmdPulls = cli.Command{
 	Name:        "pulls",
 	Aliases:     []string{"pull", "pr"},
-	Usage:       "List, create, checkout and clean pull requests",
-	Description: `List, create, checkout and clean pull requests`,
+	Usage:       "Manage and checkout pull requests",
+	Description: `Manage and checkout pull requests`,
 	ArgsUsage:   "[<pull index>]",
 	Action:      runPulls,
 	Flags:       flags.IssuePRFlags,
@@ -31,6 +31,8 @@ var CmdPulls = cli.Command{
 		&pulls.CmdPullsCheckout,
 		&pulls.CmdPullsClean,
 		&pulls.CmdPullsCreate,
+		&pulls.CmdPullsClose,
+		&pulls.CmdPullsReopen,
 	},
 }