Add typescript version to the cache key

.changeset/moody-pots-share.md

@@ -0,0 +1,5 @@
+---
+"remark-shiki-twoslash": patch
+---
+
+Adds the TypeScript version to the cache key for twoslash

VISION.md

@@ -15,7 +15,7 @@ Things I care about which might affect scope:
 
 ### Long Term Vision
 
-Today, early June 2021, Shiki Twoslash is bascially 1.0'd. It does everything the TypeScript website needs,
+Today, early June 2021, Shiki Twoslash is basically 1.0'd. It does everything the TypeScript website needs,
 and is in a good position to be used in blogs as seen on [fatihkalifa.com](https://fatihkalifa.com) and [cpojer.net](https://cpojer.net), and on serious technical documentation sites like TypeScript. 
 
 I, Orta, intend to keep maintaining Shiki Twoslash for a very long time, which means big changes will need an issue ahead of time because I can't maintain what I don't understand. Smaller things I can be flexible with.
@@ -28,4 +28,6 @@ In [the website](https://shikijs.github.io/twoslash/) I describe Shiki Twoslash
 
 What that means is that the underlaying tokens -> HTML renderer is a complete fork from Shiki. E.g. [these files](packages/shiki-twoslash/src/renderers) won't call the original shiki renderers. I don't think I'll ever commit to re-using Shiki at at that level. Which means that there are features which Shiki may implement differently from Shiki Twoslash. For example, I copied [gatsby-remark-vscode](https://github.com/andrewbranch/gatsby-remark-vscode)'s line highlighting syntax and shiki may not. 
 
-We can take ideas (and features) from Shiki, and move them upstream too but convergence isn't a goal.
+We can take ideas (and features) from Shiki, and move them upstream too but convergence isn't a goal.
+
+(2023 edit: there may be a world in which [Shiki's plugin support](https://github.com/shikijs/shiki/pull/381) is enough for Twoslash, if that happens, I'm open to moving to that.)

packages/remark-shiki-twoslash/src/caching.ts

@@ -25,9 +25,11 @@ export const cachedTwoslashCall = (
   const { createHash } = require("crypto")
   const { readFileSync, existsSync, mkdirSync, writeFileSync } = require("fs")
   const { join } = require("path")
+
   const shikiVersion = require('@typescript/twoslash/package.json').version
+  const tsVersion = require('typescript/package.json').version
   const shasum = createHash("sha1")
-  const codeSha = shasum.update(`${code}-${shikiVersion}`).digest("hex")
+  const codeSha = shasum.update(`${code}-${shikiVersion}-${tsVersion}`).digest("hex")
 
   const getNmCache = () => {
     if (__dirname.includes("node_modules")) {