pyln-proto: Avoid circular dependency in setup.py

It seems that loading the version from the source files triggers imports that
may not yet have been installed.

contrib/pyln-proto/pyln/proto/__init__.py

@@ -2,7 +2,7 @@ from .invoice import Invoice
 from .onion import OnionPayload, TlvPayload, LegacyOnionPayload
 from .wire import LightningConnection, LightningServerSocket
 
-__version__ = '0.0.1'
+__version__ = '0.0.2'
 
 __all__ = [
     "Invoice",

contrib/pyln-proto/setup.py

@@ -1,5 +1,4 @@
 from setuptools import setup
-from pyln import proto
 import io
 
 
@@ -10,7 +9,7 @@ with io.open('requirements.txt', encoding='utf-8') as f:
     requirements = [r for r in f.read().split('\n') if len(r)]
 
 setup(name='pyln-proto',
-      version=proto.__version__,
+      version='0.0.2',
       description='Pure python implementation of the Lightning Network protocol',
       long_description=long_description,
       long_description_content_type='text/markdown',