Enable pybind unit tests on CI

conanfile.py

@@ -13,7 +13,7 @@ class Pybind11(ConanFile):
     settings = "os", "compiler", "build_type", "arch"
     options = {"shared": [True, False], "fPIC": [
         True, False], "build_tests": [True, False]}
-    default_options = "shared=False", "fPIC=True", "build_tests=False"
+    default_options = "shared=False", "fPIC=True", "build_tests=True"
     generators = "cmake"
 
     def configure(self):