Include SSL configuration to work around issue with self-signed certs (…

…brianc/node-postgres#2009)

src/index.js

@@ -9,10 +9,19 @@ class KeyvPostgres extends KeyvSql {
 			dialect: 'postgres',
 			uri: 'postgresql://localhost:5432'
 		}, opts);
+
+		// Add custom SSL configuration, if "sslmode" present in connectionString (Work around issue with self-signed certs: https://github.com/brianc/node-postgres/issues/2009)
+		let ssl
+		let connectionString = opts.uri
+		const sslIndex = inputString.indexOf("sslmode")
+		if (sslIndex > 0) {
+			connectionString = connectionString.substring(0, sslIndex - 1)
+			ssl = { rejectUnauthorized: false }
+		}
 
 		opts.connect = () => Promise.resolve()
 			.then(() => {
-				const pool = new Pool({ connectionString: opts.uri });
+				const pool = new Pool({ connectionString, ssl });
 				return sql => pool.query(sql)
 					.then(data => data.rows);
 			});