Add possibility to use self signed certificate servers

[jlahtinen]

Sometimes (quite often at my workflow) sonarqube server is behind self signed certificate. It would be nice if --ca my_server_cert.pem could be one of the parameters.

Ad-hoc fix I used was

@@ -37,7 +42,7 @@ def create_args() -> argparse.ArgumentParser:
     return args
 
 def _get(url: str, token: str) -> {dict}:
-    resp = requests.get(url, auth=HTTPBasicAuth(token, ""))
+    resp = requests.get(url, auth=HTTPBasicAuth(token, ""), verify="./my_server_cert.pem")
     if resp.status_code != 200:
         print(f"Failed to fetch data: {resp.text}")
         sys.exit(1)

[jlahtinen]

env variable REQUESTS_CA_BUNDLE=/path/to/your/certificate.pem could work also