feat(esm): migrate to native esm (#53)

BREAKING CHANGE: typed-inject is now a pure ESM. Please [read this](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c)

.eslintrc

@@ -0,0 +1,62 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint", "prettier"],
+  "parserOptions": {
+    "project": ["./src/tsconfig.json", "./test/tsconfig.json"]
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/recommended-requiring-type-checking",
+    "prettier"
+  ],
+  "overrides": [
+    {
+      "files": ["test/**/*.ts"],
+      "env": {
+        "node": true
+      }
+    }
+  ],
+  "rules": {
+    "prettier/prettier": ["error"],
+    "@typescript-eslint/explicit-function-return-type": ["off"],
+    "@typescript-eslint/no-explicit-any": ["off"],
+    "@typescript-eslint/no-use-before-define": ["off"],
+    "@typescript-eslint/restrict-template-expressions": ["off"],
+    "@typescript-eslint/ban-types": [
+      "error",
+      {
+        "extendDefaults": false,
+        "types": {
+          "String": {
+            "message": "Use string instead",
+            "fixWith": "string"
+          },
+          "Boolean": {
+            "message": "Use boolean instead",
+            "fixWith": "boolean"
+          },
+          "Number": {
+            "message": "Use number instead",
+            "fixWith": "number"
+          },
+          "Symbol": {
+            "message": "Use symbol instead",
+            "fixWith": "symbol"
+          },
+
+          // object typing
+          "Object": {
+            "message": "The `Object` type actually means \"any non-nullish value\", so it is marginally better than `unknown`.\n- If you want a type meaning \"any object\", you probably want `Record<string, unknown>` instead.\n- If you want a type meaning \"any value\", you probably want `unknown` instead."
+          },
+          "object": {
+            "message": "The `object` type is currently hard to use ([see this issue](https://github.com/microsoft/TypeScript/issues/21732)).\nConsider using `Record<string, unknown>` instead, as it allows you to more easily inspect and use the keys."
+          }
+        }
+      }
+    ]
+  }
+}