bug fix

Author: Prerak Singh

pydatastructs/utils/_backend/cpp/GraphEdge.hpp

@@ -5,6 +5,7 @@
 #include <Python.h>
 #include <string>
 #include <variant>
+#include <cstdint>
 #include "GraphNode.hpp"
 
 extern PyTypeObject GraphEdgeType;

pydatastructs/utils/_extensions.py

@@ -16,6 +16,14 @@
                             'graph_utils.cpp'])]
 
 extensions = [
-    Extension(nodes, sources=nodes_sources),
-    Extension(graph_utils, sources = graph_utils_sources)
+    Extension(
+        nodes,
+        sources=nodes_sources,
+        extra_compile_args=["-std=c++17"]
+    ),
+    Extension(
+        graph_utils,
+        sources=graph_utils_sources,
+        extra_compile_args=["-std=c++17"]
+    )
 ]