[fix] types in core (#1044)

* Fix types

* Update README.md

packages/core/README.md

@@ -15,11 +15,13 @@ You can use this package to build projects like [tldraw](https://tldraw.com), wh
 Use your package manager of choice to install `@tldraw/core` and its peer dependencies.
 
 ```bash
-yarn add @tldraw/core
+yarn add @tldraw/core && yarn build
 # or
-npm i @tldraw/core
+npm i @tldraw/core && npm run build
 ```
 
+> Note: You'll need to run the `build` script before running `dev`.
+
 ## Examples
 
 There are two examples in this repository.

packages/core/tsconfig.build.json

@@ -10,6 +10,7 @@
     "dist"
   ],
   "compilerOptions": {
+    "skipLibCheck": true,
     "composite": false,
     "incremental": false,
     "declaration": true,

packages/core/tsconfig.dev.json

@@ -1,6 +1,5 @@
 {
   "extends": "./tsconfig.json",
-  "include": ["src"],
   "exclude": [
     "node_modules",
     "**/*.test.tsx",
@@ -11,6 +10,7 @@
     "dist"
   ],
   "compilerOptions": {
+    "skipLibCheck": true,
     "composite": false,
     "incremental": false,
     "declaration": true,