getdns: update dependencies, enable libuv and support cross compiling

[toge]

Specify library name and version: getdns/*

• update dependencies
• fix compilation error when with_libuv=True

---

• I've read the guidelines for contributing.
• I've followed the PEP8 style guides for Python code in the recipes.
• I've used the latest Conan client version.
• I've tried at least one configuration locally with the conan-center hook activated.

[conan-center-bot]

Failure in build 5 (65ba52508261e09557c97a5346599181daecbea6):

• getdns/1.6.0@:
  CI failed to create some packages (All logs)

  Logs for packageID aec089965487a70dc0ca82f7965fe817d2f821ab:

  [settings]
  arch=x86_64
  build_type=Release
  compiler=gcc
  compiler.libcxx=libstdc++11
  compiler.version=9
  os=Linux
  [options]
  getdns:shared=False
  

  [...]
  CMake Error at src/CMakeLists.txt:781 (add_library):
    Target "getdns_ex_ev" links to target "Libidn2::Libidn2" but the target was
    not found.  Perhaps a find_package() call is missing for an IMPORTED
    target, or an ALIAS target is missing?
  
  
  CMake Error at src/CMakeLists.txt:781 (add_library):
    Target "getdns_ex_ev" links to target "Libev::Libev" but the target was not
    found.  Perhaps a find_package() call is missing for an IMPORTED target, or
    an ALIAS target is missing?
  
  
  CMake Error at src/CMakeLists.txt:927 (add_executable):
    Target "getdns_server_mon" links to target "Libidn2::Libidn2" but the
    target was not found.  Perhaps a find_package() call is missing for an
    IMPORTED target, or an ALIAS target is missing?
  
  
  CMake Error at src/CMakeLists.txt:832 (add_library):
    Target "getdns_ex_event" links to target "Libidn2::Libidn2" but the target
    was not found.  Perhaps a find_package() call is missing for an IMPORTED
    target, or an ALIAS target is missing?
  
  
  CMake Error at src/CMakeLists.txt:884 (add_library):
    Target "getdns_ex_uv" links to target "Libidn2::Libidn2" but the target was
    not found.  Perhaps a find_package() call is missing for an IMPORTED
    target, or an ALIAS target is missing?
  
  
  CMake Error at src/CMakeLists.txt:884 (add_library):
    Target "getdns_ex_uv" links to target "Libuv::Libuv" but the target was not
    found.  Perhaps a find_package() call is missing for an IMPORTED target, or
    an ALIAS target is missing?
  
  
  CMake Error at src/CMakeLists.txt:915 (add_executable):
    Target "getdns_query" links to target "Libidn2::Libidn2" but the target was
    not found.  Perhaps a find_package() call is missing for an IMPORTED
    target, or an ALIAS target is missing?
  
  
  CMake Generate step failed.  Build files cannot be regenerated correctly.
  getdns/1.6.0: WARN: Using the new toolchains and generators without specifying a build profile (e.g: -pr:b=default) is discouraged and might cause failures and unexpected behavior
  getdns/1.6.0: WARN: Using the new toolchains and generators without specifying a build profile (e.g: -pr:b=default) is discouraged and might cause failures and unexpected behavior
  getdns/1.6.0: ERROR: Package 'aec089965487a70dc0ca82f7965fe817d2f821ab' build failed
  getdns/1.6.0: WARN: Build folder /home/conan/w/prod/BuildSingleReference/.conan/data/getdns/1.6.0/_/_/build/aec089965487a70dc0ca82f7965fe817d2f821ab/build/Release
  ERROR: getdns/1.6.0: Error in build() method, line 140
  	cmake.configure(build_script_folder=os.path.join(self.source_folder, os.pardir))
  	ConanException: Error 1 while executing cmake -G "Unix Makefiles" -DCMAKE_TOOLCHAIN_FILE="/home/conan/w/prod/BuildSingleReference/.conan/data/getdns/1.6.0/_/_/build/aec089965487a70dc0ca82f7965fe817d2f821ab/build/generators/conan_toolchain.cmake" -DCMAKE_INSTALL_PREFIX="/home/conan/w/prod/BuildSingleReference/.conan/data/getdns/1.6.0/_/_/package/aec089965487a70dc0ca82f7965fe817d2f821ab" -DCMAKE_POLICY_DEFAULT_CMP0091="NEW" -DCMAKE_BUILD_TYPE="Release" "/home/conan/w/prod/BuildSingleReference/.conan/data/getdns/1.6.0/_/_/build/aec089965487a70dc0ca82f7965fe817d2f821ab/src/.."
  

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