bump typescript to 4.7

[SergNikitin]

This unlocks a couple of nifty features in my IDE (in addition to better typechecking, of course :P )

[SergNikitin]

It's possible to throw anything in JS, this ensures that code below that expects only Errors doesn't accidentally get something else

[akindyakov]

🚃

[SergNikitin]

I converted this to draft as I encountered much more issues than originally expected

[SergNikitin]

Forgot to push the last experiments. Still failing, but much closer to something working now. Mostly blocked on this question

[SergNikitin]

Current progress

tsc --build and test commands work for armoury, smuggler-api, elementary and truthsayer. I have learnt much more about how JS works than I ever wanted to.

Next steps

• make yarn truthsayer start work (currently webpack can't find any .js files built from Typescript)
• work on archaeologist

Blockers that can be worked around for local testing

Some foundational libs that we use currently refuse to work in ESM mode which will likely be a hard blocker:

• @emotion/react - Typescript@beta moduleResolution nodenext strategy breaks @emotion emotion-js/emotion#2742
• same for react, but supposedly it's fixed in React 18

To workaround these issues locally it's possible to hot-fix respective package.json files in your own node_modules

# @emotion/react/package.json

+ "exports": {
+     ".": {
+       "import": "./dist/emotion-react.esm.js",
+       "types": "./types/index.d.ts"
+     },
+     "./jsx-runtime": {
+       "import": "./jsx-runtime/dist/emotion-react-jsx-runtime.esm.js",
+       "types": "./types/jsx-runtime.d.ts"
+     },
+     "./jsx-dev-runtime": {
+       "import": "./jsx-dev-runtime/dist/emotion-react-jsx-dev-runtime.esm.js",
+       "types": "./types/jsx-dev-runtime.d.ts"
+     }
+ }

# react/package.json

+ "exports": {
+     ".": {
+       "react-server": "./unstable-index.server.js",
+       "default": "./index.js"
+     },
+     "./index": {
+       "react-server": "./unstable-index.server.js",
+       "default": "./index.js"
+     },
+     "./build-info.json": "./build-info.json",
+     "./jsx-runtime": "./jsx-runtime.js",
+     "./jsx-dev-runtime": "./jsx-dev-runtime.js"
+ }

One less critical lib is also impacted:

• @microsoft/microsoft-graph-client - [Tracking] Publishing ES modules for Graph SDK microsoftgraph/msgraph-sdk-javascript#735, I'm not sure if that's a hard block

[SergNikitin]

This PR attempted to not only upgrade Typescript, but also to switch to ECMAScript Modules. ECMAScript Modules came up only due to issues with Jest and since they cause an enormous amount of trouble I think this effort should be put aside until ESM ecosystem matures more.

If we want to get newer versions of Typescript sooner, we should have another go but this time specifically try to do whatever it takes to not enable ESM.

[SergNikitin]

At long last, this was finally done in #766