handle prelease identifiers

npm/ng-packs/scripts/package.json

@@ -17,7 +17,8 @@
     "execa": "^2.0.3",
     "fs-extra": "^8.1.0",
     "glob": "^7.1.6",
-    "prompt-confirm": "^2.0.4"
+    "prompt-confirm": "^2.0.4",
+    "semver": "^7.3.5"
   },
   "devDependencies": {
     "@types/fs-extra": "^8.0.1",

npm/ng-packs/scripts/publish.ts

@@ -2,6 +2,7 @@ import program from 'commander';
 import execa from 'execa';
 import fse from 'fs-extra';
 import replaceWithPreview from './replace-with-preview';
+const semverParse = require('semver/functions/parse');
 
 program
   .option(
@@ -50,7 +51,7 @@ program.parse(process.argv);
 
     let tag: string;
     if (program.preview) tag = 'preview';
-    if (program.rc) tag = 'next';
+    else if (program.rc || semverParse(program.nextVersion).prerelease?.length) tag = 'next';
 
     await execa(
       'yarn',