fix(deps): require google-api-core>=1.31.5, >=2.3.2 (#40)

Author: parthea

setup.py

@@ -39,7 +39,7 @@
  platforms="Posix; MacOS X; Windows",
  include_package_data=True,
  install_requires=(
- "google-api-core[grpc] >= 1.28.0, < 3.0.0dev",
+ "google-api-core[grpc] >= 1.31.5, <3.0.0dev,!=2.0.*,!=2.1.*,!=2.2.*,!=2.3.0",
  "proto-plus >= 1.15.0",
  ),
  python_requires=">=3.6",

testing/constraints-3.6.txt

@@ -5,5 +5,5 @@
 #
 # e.g., if setup.py has "foo >= 1.14.0, < 2.0.0dev",
 # Then this file should have foo==1.14.0
-google-api-core==1.28.0
+google-api-core==1.31.5
 proto-plus==1.15.0