Update cmake version, eliminate warnings with clang

Author: kkorotkov

.gitignore

@@ -38,3 +38,4 @@
 # Generated and working files and directories
 tests/run_tests
 build
+.vscode

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.6)
+cmake_minimum_required(VERSION 3.20)
 project(netlicensing)
 
 option (BUILD_TESTS "Build unit tests." FALSE)

src/netlicensing.cc

@@ -268,9 +268,16 @@ namespace netlicensing {
       if (!escape_string(validationParameters.getLicenseeName()).empty()) {
         params.push_back(std::make_pair(PROP_LICENSEE_NAME, escape_string(validationParameters.getLicenseeName())));
       }
+#ifdef __clang__
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
       if (!escape_string(validationParameters.getLicenseeSecret()).empty()) {
         params.push_back(std::make_pair(PROP_LICENSEE_SECRET, escape_string(validationParameters.getLicenseeSecret())));
       }
+#ifdef __clang__
+#pragma clang diagnostic pop
+#endif
 
       int paramIt = 0;
       for(auto const &ent1 : validationParameters.getParameters()) {