change to pystac 1.1.0

Author: jonhealy1

CHANGELOG.md

@@ -7,7 +7,7 @@ The format is (loosely) based on [Keep a Changelog](http://keepachangelog.com/)
 ## [v2.4.0] - 2021-11-28
 ### Changed
 
-- Upgraded pystac to 1.2.0 from 0.5.6
+- Upgraded pystac to 1.1.0 from 0.5.6
 
 ## [v2.3.0] - 2021-08-31
 ### Added

setup.py

@@ -33,7 +33,7 @@
     install_requires=[
         "requests>=2.19.1",
         "jsonschema>=3.2.0",
-        "pystac[validation]==1.2.0",
+        "pystac[validation]==1.1.0",
         "click>=8.0.0",
     ],
     packages=["stac_validator"],