Bump version: 3.1.2 → 3.2.0

I had forgotten to bump the version for 3.2.0... Sorry :(

This is not a problem for the released packages, since versioneer correctly writes the tagged version.
It's only the hard-coded version string that's used as a fallback if git fails to compute the version which I forgot to update.

Lib/fontTools/__init__.py

@@ -9,7 +9,7 @@ log = logging.getLogger(__name__)
 v = get_versions()
 if v["error"]:
     __import__('warnings').warn("versioneer: %s" % v['error'], RuntimeWarning)
-    __version__ = "3.1.2"
+    __version__ = "3.2.0"
 else:
     __version__ = v['version']
 del get_versions, v

setup.cfg

@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.1.2
+current_version = 3.2.0
 commit = True
 tag = True
 tag_name = {new_version}