Make ARGON2_WASM_MEMORY_THRESHOLD_RELOAD a static class property

To be able to change its value

.eslintrc.js

@@ -1,7 +1,7 @@
 module.exports = {
   'extends': 'airbnb-base',
   'parserOptions': {
-    'ecmaVersion': 11,
+    'ecmaVersion': 2022,
     'sourceType': 'module'
   },
 

openpgp.d.ts

@@ -926,6 +926,7 @@ export namespace enums {
 
 export declare class Argon2S2K {
   static reloadWasmModule(): void;
+  static ARGON2_WASM_MEMORY_THRESHOLD_RELOAD: number;
   constructor(config: Config);
   salt: Uint8Array;
   /** @throws Argon2OutOfMemoryError */

src/type/s2k/argon2.js

@@ -23,9 +23,18 @@ export class Argon2OutOfMemoryError extends Error {
 let loadArgonWasmModule;
 let argon2Promise;
 // reload wasm module above this treshold, to deallocated used memory
-const ARGON2_WASM_MEMORY_THRESHOLD_RELOAD = 2 << 19;
+// (cannot be declared as a simple `static` field as its not supported by Safari 14)
+let ARGON2_WASM_MEMORY_THRESHOLD_RELOAD = 2 << 19;
 
 class Argon2S2K {
+  static get ARGON2_WASM_MEMORY_THRESHOLD_RELOAD() {
+    return ARGON2_WASM_MEMORY_THRESHOLD_RELOAD;
+  }
+
+  static set ARGON2_WASM_MEMORY_THRESHOLD_RELOAD(memoryThreshold) {
+    ARGON2_WASM_MEMORY_THRESHOLD_RELOAD = memoryThreshold;
+  }
+
   static reloadWasmModule() {
     if (!loadArgonWasmModule) return;
 
@@ -121,7 +130,7 @@ class Argon2S2K {
       });
 
       // a lot of memory was used, reload to deallocate
-      if (decodedM > ARGON2_WASM_MEMORY_THRESHOLD_RELOAD) {
+      if (decodedM > Argon2S2K.ARGON2_WASM_MEMORY_THRESHOLD_RELOAD) {
         Argon2S2K.reloadWasmModule();
       }
       return hash;