support rpg maker mz file extensions

Author: kaey

README.md

@@ -12,6 +12,7 @@ Currently supports:
 - Inform 7 (blorb)
 - RPG Maker VX Ace (rgss3a, v3 only)
 - RPG Maker MV (rpgmvp, rpgmvm, rpgmvo)
+- RPG Maker MZ (png_, m4a_, ogg_)
 - Ren'py (rpa, v3 only)
 - Wolf RPG (dxa, v6 only, compression unsupported)
 - Electron (asar)

cmd/gamearc-rpgmv/main.go

@@ -85,11 +85,11 @@ filesLoop:
 		base := strings.TrimSuffix(filepath.Base(srcfile.Name()), ext) // basename without extension (for ex w04_16)
 
 		switch ext {
-		case ".rpgmvp":
+		case ".rpgmvp", ".png_":
 			ext = ".png"
-		case ".rpgmvm":
+		case ".rpgmvm", ".m4a_":
 			ext = ".m4a"
-		case ".rpgmvo":
+		case ".rpgmvo", ".ogg_":
 			ext = ".ogg"
 		default:
 			// Not encrypted.