Improved pre-commit and pre-publish workflows

Installed `npm` package now has `types` directory and doesn't have `src` directory

src/tsconfig.declarations.json

@@ -0,0 +1,13 @@
+{
+  "extends": "./tsconfig.node.json",
+  "compilerOptions": {
+    "outDir": "../types",
+    "declaration": true,
+    "emitDeclarationOnly": true,
+    "skipLibCheck": true
+  },
+  "include": [
+    "../src",
+    "../index.ts"
+  ]
+}