chore: present iso-2022-jp-katakana as a regular table

Author: ChALkeR

fallback/multi-byte.table.js

@@ -106,7 +106,7 @@ export function getTable(id) {
     while (idx.length > 0) res.push([(a += idx.shift()), (b += idx.shift())]) // destroying, we remove it later anyway
   } else if (id.endsWith('-katakana')) {
     let a = -1
-    res = indices[id].map((x) => (a += x + 1))
+    res = new Uint16Array(indices[id].map((x) => (a += x + 1)))
   } else if (id === 'big5') {
     if (!Object.hasOwn(sizes, id)) throw new Error('Unknown encoding')
     res = new Uint32Array(sizes[id]) // array of strings or undefined

tests/multi-byte.tables.test.js

@@ -110,7 +110,10 @@ describe('multi-byte ranges tables', () => {
 })
 
 describe('multi-byte encodings index: WHATWG non-normative indexes.json', () => {
-  for (const [encoding, data] of Object.entries(multiByte)) {
+  for (const [encoding, data] of Object.entries({
+    ...multiByte,
+    'iso-2022-jp-katakana': katakana,
+  })) {
     test(encoding, (t) => {
       t.assert.ok(!data.includes(0))
       t.assert.ok(!data.includes(0xff_fd))
@@ -131,8 +134,4 @@ describe('multi-byte encodings index: WHATWG non-normative indexes.json', () =>
   test('gb18030-ranges', (t) => {
     t.assert.deepStrictEqual(getTable('gb18030-ranges'), gb18030ranges)
   })
-
-  test('iso-2022-jp-katakana', (t) => {
-    t.assert.deepStrictEqual(getTable('iso-2022-jp-katakana'), katakana)
-  })
 })