Version 1.0

Now that Python 3.7 is released, we commit to backward compatibility with its
API, so burn that into the version number.

importlib_resources/docs/changelog.rst

@@ -2,7 +2,7 @@
  importlib_resources NEWS
 ==========================
 
-1.0 (2018-XX-XX)
+1.0 (2018-06-28)
 ================
 * Backport fix for test isolation from Python 3.8/3.7.  Closes #61
 

importlib_resources/version.txt

-0.8
+1.0