Upgrade importlib-metadata to 0.18 (#24848)

homeassistant/package_constraints.txt

@@ -11,7 +11,7 @@ cryptography==2.7
 distro==1.4.0
 hass-nabucasa==0.15
 home-assistant-frontend==20190627.0
-importlib-metadata==0.15
+importlib-metadata==0.18
 jinja2>=2.10.1
 netdisco==2.6.0
 pip>=8.0.3

requirements_all.txt

@@ -5,7 +5,7 @@ async_timeout==3.0.1
 attrs==19.1.0
 bcrypt==3.1.6
 certifi>=2019.6.16
-importlib-metadata==0.15
+importlib-metadata==0.18
 jinja2>=2.10.1
 PyJWT==1.7.1
 cryptography==2.7

setup.py

@@ -38,7 +38,7 @@ REQUIRES = [
     'attrs==19.1.0',
     'bcrypt==3.1.6',
     'certifi>=2019.6.16',
-    'importlib-metadata==0.15',
+    'importlib-metadata==0.18',
     'jinja2>=2.10.1',
     'PyJWT==1.7.1',
     # PyJWT has loose dependency. We want the latest one.