Remove unnecessary boost::system requirement for NuDB (#34)

The NuDB recipe will not build when using Boost 1.89+ as `boost::system`
is no longer there, and has actually not even been needed since Boost
1.69. See also
conan-io#28808.

This change, therefore, removes that requirement from NuDB's
`conanfile.py`, and bumps the Boost version too. Local testing with
`xrpld` shows that the compilation succeeds.

Author: bthomee

.github/workflows/export.yml

@@ -39,6 +39,7 @@ jobs:
           conan export ed25519/all --version=2015.03
           conan export grpc/all --version=1.72.0
           conan export m4/all --version=1.4.19
+          conan export nudb/all --version=2.0.9
           conan export openssl/3.x.x --version=3.5.4
           conan export secp256k1/all --version=0.7.0
           conan export snappy/all --version=1.1.10

recipes/nudb/all/conanfile.py

@@ -28,7 +28,7 @@ def layout(self):
         basic_layout(self, src_folder="src")
 
     def requirements(self):
-        self.requires("boost/1.83.0")
+        self.requires("boost/1.90.0")
 
     def package_id(self):
         self.info.clear()
@@ -61,7 +61,7 @@ def package_info(self):
         self.cpp_info.components["core"].set_property("cmake_target_name", "nudb")
         self.cpp_info.components["core"].names["cmake_find_package"] = "nudb"
         self.cpp_info.components["core"].names["cmake_find_package_multi"] = "nudb"
-        self.cpp_info.components["core"].requires = ["boost::thread", "boost::system"]
+        self.cpp_info.components["core"].requires = ["boost::thread"]
 
         # TODO: to remove in conan v2 once cmake_find_package_* generators removed
         self.cpp_info.names["cmake_find_package"] = "NuDB"