Pin BoTorch to 0.11.3 (#2594)

Summary:
Pull Request resolved: #2594

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Reviewed By: mgarrard

Differential Revision: D60069260

fbshipit-source-id: a01ceea35a7ef89ff2bfe166f0419a36932d512d

setup.py

@@ -8,7 +8,7 @@
 
 from setuptools import find_packages, setup
 
-PINNED_BOTORCH_VERSION = "0.11.0"
+PINNED_BOTORCH_VERSION = "0.11.3"
 
 if os.environ.get("ALLOW_BOTORCH_LATEST"):
     # allows a more recent previously installed version of botorch to remain