os: Release 0.4.3.

Author: Paul Sokolovsky

os/metadata.txt

@@ -1,5 +1,5 @@
 srctype = micropython-lib
 type = package
-version = 0.4.2
+version = 0.4.3
 author = Paul Sokolovsky
 depends = ffilib, errno, stat

os/setup.py

@@ -6,7 +6,7 @@
 
 
 setup(name='micropython-os',
-      version='0.4.2',
+      version='0.4.3',
       description='os module for MicroPython',
       long_description="This is a module reimplemented specifically for MicroPython standard library,\nwith efficient and lean design in mind. Note that this module is likely work\nin progress and likely supports just a subset of CPython's corresponding\nmodule. Please help with the development if you are interested in this\nmodule.",
       url='https://github.com/micropython/micropython/issues/405',