bump version number to 0.4

dist/PKGBUILD

 # Maintainer: Thomas Buck <thomas@xythobuz.de>
 pkgname=OctoTray
-pkgver=0.3
+pkgver=0.4
 pkgrel=1
 pkgdesc="Control OctoPrint instances from system tray"
 arch=('any')

dist/setup_mac.py

 APP_NAME = "OctoTray"
 APP = [ 'octotray.py' ]
 DATA_FILES = [ 'octotray_icon.png' ]
-VERSION="0.3.0"
+VERSION="0.4.0"
 
 OPTIONS = {
     'argv_emulation': True,

src/octotray.py

 class OctoTray():
     name = "OctoTray"
     vendor = "xythobuz"
-    version = "0.3"
+    version = "0.4"
 
     iconName = "octotray_icon.png"
     iconPaths = [