Bump eslint to v9

eslint.config.mjs

@@ -0,0 +1,3 @@
+import {common} from '@evanpurkhiser/eslint-config';
+
+export default [...common];

package.json

@@ -54,12 +54,12 @@
     "strict-event-emitter-types": "^2.0.0"
   },
   "devDependencies": {
-    "@evanpurkhiser/eslint-config": "^0.20.0",
+    "@evanpurkhiser/eslint-config": "^0.25.0",
     "@types/jest": "^29.2.0",
     "@types/stream-buffers": "^3.0.4",
     "@types/webpack": "^5.28.0",
     "@types/webpack-node-externals": "^2.5.3",
-    "eslint": "^8.45.0",
+    "eslint": "^9.15.0",
     "eslint-plugin-jest": "^27.1.3",
     "jest": "^29.7.0",
     "jest-each": "^29.2.1",

src/nfs/rpc.ts

@@ -62,11 +62,9 @@ export class RpcConnection {
     this.mutex = new Mutex();
   }
 
-  get connected() {
-    // TODO: Figure out what logic we can do here to determine if the socket is
-    // still open.
-    return true;
-  }
+  // TODO: Turn this into a getter and figure out what logic we can do here
+  // to determine if the socket is still open.
+  connected = true;
 
   setupRequest({program, version, procedure, data}: Omit<RpcCall, 'port'>) {
     const auth = new rpc.Auth({

src/remotedb/fields.ts

@@ -13,22 +13,24 @@ export enum FieldType {
   String = 0x26,
 }
 
-/**
- * The generic interface for all field types
- */
-export interface BaseField {
+export abstract class BaseField {
+  // The constructor property (which is used to access the class from an
+  // instance of it) must be set to the BaseClass object so we can access the
+  // `.type` property.
+  //
+  // @see https://github.com/Microsoft/TypeScript/issues/3841#issuecomment-337560146
+  declare ['constructor']: typeof BaseField;
+
   /**
    * The raw field data
    */
-  data: Buffer;
+  declare data: Buffer;
   /**
    * Corce the field into a buffer. This differs from reading the data
    * property in that it will include the field type header.
    */
-  readonly buffer: Buffer;
-}
+  abstract buffer: Buffer;
 
-export class BaseField {
   /**
    * Declares the type of field this class represents
    */
@@ -40,16 +42,6 @@ export class BaseField {
    * reading the field type, returning the next number of bytes to read.
    */
   static bytesToRead: number | ((reportedLength: number) => number);
-
-  // The constructor property (which is used to access the class from an
-  // instance of it) must be set to the BaseClass object so we can access the
-  // `.type` property.
-  //
-  // @see https://github.com/Microsoft/TypeScript/issues/3841#issuecomment-337560146
-  //
-  // eslint-disable-next-line @typescript-eslint/ban-ts-comment
-  // @ts-ignore
-  ['constructor']: typeof BaseField;
 }
 
 export type NumberField<T extends number = number> = BaseField & {