Asynchronous Errors not Handled Properly

[Omaro-IB]

Bug Description

When certain functions (I encountered the error with mpv.getProperty but I assume it also occurs with other async functions) are called before mpv.start(), node crashes instead of throwing an error or something

How To Reproduce

Steps to reproduce the behavior: just call mpv.getProperty("filename") without mpv.start() first

Expected behavior

Some error is printed to the console without crashing the program

Software Versions

• Node-Mpv: 2.0.0-beta.2
• MPV: mpv 0.37.0
• OS: Linux Debian (Kubuntu)

Additional context

The Socket class in the node:net module provides event listeners which can be used to handle these errors. For example, for the send function:

send: function(command) {
		return new Promise((resolve, reject) => {

			...

			// create an ipcRequest object to store the required information for error messages
			// put the resolve function in the ipcRequests dictionary to call it later
			this.ipcRequests[request_id] = new ipcRequest(resolve, reject, Object.values(command).splice(1));

			// BEGIN: patch
			// Listen for the "error" event
			const handleError = (err) => {this.socket.removeListener('error', handleError); return reject('An error occurred:', err.message)}  // TODO: improve error message
			this.socket.on('error', handleError);
			// END: patch

			try{
				this.socket.write(JSON.stringify(messageJson) + '\n');
			}
			// reject the promise in case of an error
			catch(error) {
				return reject(this.errorHandler.errorMessage(7, message, 'send()', JSON.stringify(command)));
			}
		})

	}