fix: mark internal packages as private #972 (#1970)

Author: escapedcat

@packages/babel-preset-commitlint/package.json

@@ -2,6 +2,7 @@
   "name": "babel-preset-commitlint",
   "version": "9.0.1",
   "description": "Lint your commit messages",
+  "private": true,
   "main": "index.js",
   "files": [
     "index.js"

@packages/test-environment/package.json

@@ -2,6 +2,7 @@
   "name": "@commitlint/test-environment",
   "version": "9.1.0",
   "description": "test environment for @commitlint",
+  "private": true,
   "main": "lib/test-environment.js",
   "types": "lib/test-environment.d.ts",
   "files": [

@packages/test/package.json

@@ -2,6 +2,7 @@
   "name": "@commitlint/test",
   "version": "9.1.0",
   "description": "test utilities for @commitlint",
+  "private": true,
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "files": [

@packages/utils/package.json

@@ -2,6 +2,7 @@
   "name": "@commitlint/utils",
   "version": "9.1.0",
   "description": "Development utilities for @commitlint",
+  "private": true,
   "files": [
     "dep-check.js",
     "pkg-check.js"