tools/mpremote: Bump version to 0.3.0.

Signed-off-by: Damien George <damien@micropython.org>

tools/mpremote/mpremote/__init__.py

@@ -1 +1 @@
-__version__ = "0.2.0"
+__version__ = "0.3.0"

tools/mpremote/setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = mpremote
-version = 0.2.0
+version = 0.3.0
 author = Damien George
 author_email = damien@micropython.org
 description = Tool for interacting remotely with MicroPython