refactor(jmespath): fix code quality issues (#4286)

Co-authored-by: David <75678655+David-Werth@users.noreply.github.com>
Co-authored-by: Stefano Vozza <svozza@amazon.com>

Author: dwrth

packages/jmespath/src/Lexer.ts

@@ -81,7 +81,7 @@ class Lexer {
    *
    * @param current The current character
    */
-  #consumeComparatorSigns = (
+  readonly #consumeComparatorSigns = (
     current: '<' | '>' | '!' | '=' | '|' | '&'
   ): Token => {
     switch (current) {

packages/jmespath/src/Parser.ts

@@ -30,7 +30,7 @@ import { ParsedResult } from './ParsedResult.js';
 import type { Node, Token } from './types.js';
 
 /**
- * Top down operaotr precedence parser for JMESPath.
+ * Top down operator precedence parser for JMESPath.
  *
  * ## References
  * The implementation of this Parser is based on the implementation of
@@ -48,15 +48,15 @@ class Parser {
    * The maximum binding power for a token
    * that can stop a projection.
    */
-  #projectionStop = 10;
+  readonly #projectionStop = 10;
   /**
    * Cache object
    */
   #cache: Record<string, ParsedResult> = {};
   /**
    * The maximum size of the cache.
    */
-  #maxCacheSize = 128;
+  readonly #maxCacheSize = 128;
   #tokenizer?: Lexer;
   #tokens: Token[];
   #index = 0;

packages/jmespath/src/TreeInterpreter.ts

@@ -25,7 +25,7 @@ import { isTruthy, sliceArray } from './utils.js';
  * @internal
  */
 class TreeInterpreter {
-  #functions: Functions;
+  readonly #functions: Functions;
 
   /**
    * @param options The options to use for the interpreter.