feat(ci): Add knip, remove depcheck (#140)

Adds a (kind of lame) initial configuration for
[knip](https://github.com/webpro/knip), which replaces depcheck. By
default, this will report on a lot of useful stuff, so may require
further tuning/configuration as we learn how to use it preoperly.

(While getting this PR ready, `knip` actually complained to me after I
`yarn remove`'d `depcheck` but _before_ I updated the GH workflow to use
`knip` instead of `depcheck`. It was able to detect that without
`depcheck` installed, there was no such binary named `depcheck`
available in the package, which we were still referencing in the GH
workflow -- kind of wild!!)

.github/workflows/workflow.yaml

@@ -34,8 +34,8 @@ jobs:
       - run: yarn typecheck
       - run: yarn format:check
       - run: yarn lint
-  depcheck:
-    name: Depcheck
+  knip:
+    name: Knip
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -44,7 +44,7 @@ jobs:
           node-version: '18'
           check-latest: true
       - run: yarn
-      - run: yarn depcheck
+      - run: yarn knip
   test:
     name: Test
     runs-on: ubuntu-latest

.knip.json

@@ -0,0 +1,5 @@
+{
+  "entry": ["src/index.ts"],
+  "project": ["src/**/*/.ts"],
+  "ignoreDependencies": ["@types/jest", "@valora/prettier-config"]
+}

README.md

@@ -74,9 +74,9 @@ This project uses [ESLint](https://eslint.org/) for linting. That is configured
 
 We use [Prettier](https://prettier.io) for auto-formatting. It's recommended to install an editor plugin (like the [VSCode Prettier plugin](https://marketplace.visualstudio.com/items?itemName=esbenp.prettier-vscode)) to get auto-formatting on save. There's also a `yarn format` script you can run to format all files in the project.
 
-## Dependency Checking
+## Dependency / Unused Code Checking
 
-This project uses [depcheck](https://github.com/depcheck/depcheck) for checking dependency use. It's configured in [`.depcheckrc`](.depcheckrc).
+This project uses [knip](https://github.com/webpro/knip) for checking both unused dependencies and code within the repo. This tool can catch a *lot* of stuff, including unused dependencies, functions, types, unnecessary/duplicate exports, unused class/enum members, etc. It's configured in [`.knip.json`](.knip.json).
 
 ## Scripts
 

package.json

@@ -17,28 +17,28 @@
     "lint:fix": "yarn lint --fix",
     "format": "prettier --log-level error --write .",
     "format:check": "prettier --check .",
-    "depcheck": "depcheck",
     "test": "jest",
     "test:watch": "yarn test --watch",
     "test:ci": "yarn test --ci --coverage",
-    "supercheck": "yarn format && yarn lint:fix && yarn typecheck && yarn depcheck && yarn test",
+    "supercheck": "yarn format && yarn lint:fix && yarn typecheck && yarn knip && yarn test",
     "example": "ts-node ./scripts/example.ts",
-    "deploy": "echo 'Deployed!'"
+    "deploy": "echo 'Deployed!'",
+    "knip": "knip"
   },
   "devDependencies": {
     "@types/jest": "^29.5.6",
     "@types/shelljs": "^0.8.14",
     "@typescript-eslint/eslint-plugin": "^6.5.0",
     "@valora/eslint-config-typescript": "^1.0.2",
     "@valora/prettier-config": "^0.0.1",
-    "depcheck": "^1.4.7",
     "eslint": "^8.48.0",
     "eslint-plugin-import": "^2.28.1",
     "eslint-plugin-jest": "^27.2.3",
     "eslint-plugin-react": "^7.33.2",
     "eslint-plugin-react-hooks": "^4.6.0",
     "eslint-plugin-react-native": "^4.0.0",
     "jest": "^29.7.0",
+    "knip": "^2.38.6",
     "prettier": "^3.0.3",
     "shelljs": "^0.8.5",
     "ts-jest": "^29.1.1",