Don't use build output for /esm/* exports

When using the build output for these exports the tests which import
these modules as part of the test case fail.

This has two reasons:
1. In CI/CD npm run build is not run before the tests so the
   modules fail to be imported. This could be solved by first building
   the package.
2. In the tests the modules are imported via ES Modules syntax and the
   import function and the result is compared for referential equality.
   When the built file is imported through the import function and
   it's compared to the source file the reference is always
   not the same.

When this part of the code is converted to TypeScript these issues must
be addressed.

package.json

@@ -45,11 +45,11 @@
     "./lib/": "./dist/lib/",
     "./utils/": "./dist/utils/",
     "./package.json": "./package.json",
-    "./esm/cli": "./dist/cli/index.mjs",
-    "./esm/generators/*": "./dist/generators/*/esm.mjs",
-    "./esm/generators": "./dist/lib/constants/generators.mjs",
-    "./esm/priorities": "./dist/lib/constants/priorities.mjs",
-    "./esm/support": "./dist/lib/support/index.cjs"
+    "./esm/cli": "./cli/index.mjs",
+    "./esm/generators/*": "./generators/*/esm.mjs",
+    "./esm/generators": "./lib/constants/generators.mjs",
+    "./esm/priorities": "./lib/constants/priorities.mjs",
+    "./esm/support": "./lib/support/index.cjs"
   },
   "main": "dist/lib/index.js",
   "bin": {
@@ -78,6 +78,7 @@
     "prettier:format": "prettier --write \"{,**/}*.{js,ts,cjs,mjs,json,md,yml,java}\"",
     "pretest": "npm run lint",
     "test": "mocha test generators --no-insight --forbid-only --parallel --max-old-space-size=4096",
+    "test-single": "mocha test test/cli/cli.spec.js",
     "update-snapshot": "mocha --no-insight --no-parallel --updateSnapshot --",
     "update-snapshots": "npm run update-snapshot -- test generators"
   },