Add license to source distribution (palantir#396)

mariusvniekerk · Jorge Senín · commit 3b48404cb68b · 2018-12-18T08:38:49.000+01:00
diff --git a/MANIFEST.in b/MANIFEST.in
@@ -1,3 +1,4 @@
 include README.rst
 include versioneer.py
 include pyls/_version.py
+include LICENSE
