Change manifests order for Library Manager

HISTORY.rst

@@ -39,6 +39,7 @@ PlatformIO 3.0
 * Do not overwrite project configuration variables when system environment
   variables are set
 * Handle dependencies when installing non-registry package/library (VCS, archive, local folder)
+  (`issue #913 <https://github.com/platformio/platformio-core/issues/913>`_)
 * Fixed package installing with VCS branch for Python 2.7.3
   (`issue #885 <https://github.com/platformio/platformio-core/issues/885>`_)
 

platformio/managers/lib.py

@@ -37,7 +37,7 @@ class LibraryManager(BasePkgManager):
     @property
     def manifest_names(self):
         return [
-            ".library.json", "library.properties", "library.json",
+            ".library.json", "library.json", "library.properties",
             "module.json"
         ]