fix: unbreak inline snapshots

Sadly, Prettier v3 breaks inline snapshots:

   FAIL  packages/legacy/src/parser/__tests__/parse-test.ts
    ● Test suite failed to run

      Jest: Inline Snapshots are not supported when using Prettier 3.0.0 or above.
      See https://jestjs.io/docs/configuration/#prettierpath-string for alternatives.

        at saveInlineSnapshots (node_modules/jest-snapshot/build/InlineSnapshots.js:101:15)

So, as noted in:

- jestjs/jest#14367

set `prettierPath` in the Jest config, install v2 just for use by Jest,
update the snapshots, which now have an, um, prettier format, like this:

    -       "selections": Array [
    -         Object {
    +       "selections": [
    +         {

and then re-run Prettier manually with `yarn format` to make sure that
everything remains stable.

jest.config.js

@@ -12,6 +12,7 @@ module.exports = {
     '@masochist/(.+)$': '<rootDir>packages/$1/src',
   },
   preset: 'ts-jest',
+  prettierPath: require.resolve('prettier-v2-for-jest-inline-snapshots'),
   testMatch: ['**/__tests__/**/*-test.[jt]s?(x)'],
   testPathIgnorePatterns: [
     ...defaults.testPathIgnorePatterns,

package.json

@@ -14,6 +14,7 @@
     "@types/node": "*",
     "jest": "*",
     "prettier": "*",
+    "prettier-v2-for-jest-inline-snapshots": "npm:prettier@^2",
     "ts-jest": "*",
     "typescript": "*"
   },