deps: use @agilgur5/tsconfig to simplify tsconfig

Basically same as agilgur5/react-signature-canvas@cc6cce9

- this is my own tsconfig base (https://github.com/agilgur5/tsconfig) built on top of @tsconfig/strictest (https://github.com/tsconfig/bases)
  - as you can see, it just reduces all the non-type-checking related config that @tsconfig/strictest doesn't cover

- TS doesn't yet support package `exports` for tsconfigs yet (microsoft/TypeScript#48665), hence the longer path into the package

- Relative paths in tsconfig bases are also relative _within_ `node_modules` (microsoft/TypeScript#29172), so have to repeat any relative paths here
  - And due to this, I think it's better right now for `build` to extend the base here instead of the `build` tsconfig in `@agilgur5/tsconfig`
    - I didn't fully think that one through when I made it tbh, though it still serves as a good example tsconfig
    - Maybe that will be different in the future if TS changes or otherwise comes up with a solution to this (see the issue)

package.json

@@ -57,6 +57,7 @@
     "@babel/runtime": "^7.17.9"
   },
   "devDependencies": {
+    "@agilgur5/tsconfig": "^0.0.2",
     "@babel/core": "^7.17.9",
     "@babel/plugin-transform-runtime": "^7.17.0",
     "@babel/preset-env": "^7.16.11",
@@ -66,7 +67,6 @@
     "@rollup/plugin-babel": "^5.3.1",
     "@rollup/plugin-commonjs": "^21.0.3",
     "@rollup/plugin-node-resolve": "^13.2.0",
-    "@tsconfig/strictest": "^1.0.0",
     "changelog-maker": "^3.0.0",
     "concurrently": "^7.1.0",
     "jest": "^27.5.1",

tsconfig.json

@@ -1,25 +1,11 @@
 {
-  // https://github.com/tsconfig/bases
-  "extends": "@tsconfig/strictest/tsconfig.json",
+  // https://github.com/agilgur5/tsconfig
+  "extends": "@agilgur5/tsconfig/src/tsconfig.library.json",
   // exclude node_modules (the default), dist dir, coverage dir
   "exclude": ["node_modules/", "dist/", "coverage/"],
   // see https://www.typescriptlang.org/tsconfig to better understand tsconfigs
   "compilerOptions": {
     // output to dist/ dir
     "outDir": "dist/",
-    // output .d.ts declaration files for consumers
-    "declaration": true,
-    // output .d.ts.map declaration map files for consumers
-    "declarationMap": true,
-    // output .js.map sourcemap files for consumers
-    "sourceMap": true,
-    // use Node's module resolution algorithm, instead of the legacy TS one
-    "moduleResolution": "node",
-    // resolve JSON files
-    "resolveJsonModule": true,
-    // transpile JSX to React.createElement
-    "jsx": "react",
-    // ignored during builds, but commonly used when type-checking with `tsc`
-    "noEmit": true,
   }
 }