Bump BoTorch requirement to 0.13.0 (#3297)

Summary: To be released on Monday morning.

Reviewed By: esantorella

Differential Revision: D68980241

Pulled By: saitcakmak

fbshipit-source-id: ae543b0c99a5f273c29c2705b00d061f6ae01aba

setup.py

@@ -8,7 +8,7 @@
 
 from setuptools import find_packages, setup
 
-PINNED_BOTORCH_VERSION = "0.12.0"
+PINNED_BOTORCH_VERSION = "0.13.0"
 
 if os.environ.get("ALLOW_BOTORCH_LATEST"):
     # allows a more recent previously installed version of botorch to remain