Update args min version to 1.5.0 (#2016)

diff --git a/pubspec.yaml b/pubspec.yaml
index fa96ecb..01b2e1e 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -9,7 +9,7 @@
 
 dependencies:
   analyzer: ^0.38.2
-  args: '>=1.4.1 <2.0.0'
+  args: '>=1.5.0 <2.0.0'
   collection: ^1.2.0
   crypto: ^2.0.6
   html: '>=0.12.1 <0.15.0'