[Libs/JS] Revert ESM build (#1572)

It's breaking some consumers of the package. Revert until we do the ESM
packaging properly.

Author: svix-lucho

javascript/package.json

@@ -4,22 +4,22 @@
   "description": "Svix webhooks API client and webhook verification library",
   "author": "svix",
   "repository": "https://github.com/svix/svix-libs",
+  "type": "commonjs",
   "keywords": [
     "svix",
     "diahook",
     "webhooks",
     "typescript"
   ],
   "license": "MIT",
-  "type": "commonjs",
-  "main": "./dist/cjs/index.js",
-  "typings": "./dist/cjs/index.d.ts",
+  "main": "./dist/index.js",
+  "typings": "./dist/index.d.ts",
   "files": [
     "src",
     "dist"
   ],
   "scripts": {
-    "build": "tsc --project tsconfig.cjs.json && tsc --project tsconfig.esm.json",
+    "build": "tsc",
     "prepare": "yarn run build",
     "test": "jest",
     "prepublishOnly": "yarn lint",

javascript/tsconfig.esm.json

@@ -7,27 +7,24 @@
     "moduleResolution": "node",
     "declaration": true,
     "allowJs": true,
+
     /* Additional Checks */
     "noUnusedLocals": false /* Report errors on unused locals. */, // TODO: reenable (unused imports!)
     "noUnusedParameters": false /* Report errors on unused parameters. */, // TODO: set to true again
     "noImplicitReturns": true /* Report error when not all code paths in function return a value. */,
     "noFallthroughCasesInSwitch": true /* Report errors for fallthrough cases in switch statement. */,
+
     "removeComments": true,
     "sourceMap": true,
-    "outDir": "./dist/cjs",
+    "outDir": "./dist",
     "noLib": false,
-    "lib": [
-      "es6",
-      "dom"
-    ]
+    "lib": ["es6", "dom"]
   },
   "exclude": [
     "dist",
     "node_modules",
     "jest.config.js",
     "src/**/*.test.ts",
   ],
-  "filesGlob": [
-    "./src/**/*.ts"
-  ]
-}
+  "filesGlob": ["./src/**/*.ts"]
+}