more qiskit 1.0 compatibility

requirements.txt

@@ -1,5 +1,5 @@
 connexion>=2.12.0
-qiskit==0.45.3
+qiskit
 thrift>=0.15.0
 matplotlib>=3.5.1
 waitress>=2.1.1

src/qrisp/circuit/quantum_circuit.py

@@ -1059,7 +1059,17 @@ def qasm(self, formatted=False, filename=None, encoding=None):
             The OPENQASM string.
 
         """
-        return self.to_qiskit().qasm(formatted, filename, encoding)
+        qiskit_qc = self.to_qiskit()
+        if hasattr(qiskit_qc, "qasm"):
+            qasm_str = qiskit_qc.qasm(formatted, filename, encoding)
+        else:
+            from qiskit.qasm2 import dump, dumps
+            if filename:
+                qasm_str = dump(qiskit_qc, filename)
+            else:
+                qasm_str = dumps(qiskit_qc)
+
+        return qasm_str
 
     def depth(self, depth_indicator = lambda x : 1, transpile=True):
         """