fix(esm): add .js extension to imports

This will output ESM valid imports.

src/compare.ts

@@ -1,5 +1,5 @@
-import { compareVersions } from './compareVersions';
-import { CompareOperator } from './utils';
+import { compareVersions } from './compareVersions.js';
+import { CompareOperator } from './utils.js';
 
 /**
  * Compare [semver](https://semver.org/) version strings using the specified operator.

src/compareVersions.ts

@@ -1,4 +1,4 @@
-import { compareSegments, validateAndParse } from './utils';
+import { compareSegments, validateAndParse } from './utils.js';
 
 /**
  * Compare [semver](https://semver.org/) version strings to find greater, equal or lesser.

src/index.ts

@@ -1,5 +1,5 @@
-export { compare } from './compare';
-export { compareVersions } from './compareVersions';
-export { satisfies } from './satisfies';
-export { CompareOperator } from './utils';
-export { validate, validateStrict } from './validate';
+export { compare } from './compare.js';
+export { compareVersions } from './compareVersions.js';
+export { satisfies } from './satisfies.js';
+export { CompareOperator } from './utils.js';
+export { validate, validateStrict } from './validate.js';

src/satisfies.ts

@@ -1,5 +1,5 @@
-import { compare } from './compare';
-import { CompareOperator, compareSegments, validateAndParse } from './utils';
+import { compare } from './compare.js';
+import { CompareOperator, compareSegments, validateAndParse } from './utils.js';
 
 /**
  * Match [npm semver](https://docs.npmjs.com/cli/v6/using-npm/semver) version range.

src/validate.ts

@@ -1,4 +1,4 @@
-import { semver } from './utils';
+import { semver } from './utils.js';
 
 /**
  * Validate [semver](https://semver.org/) version strings.