[BUG] Performing a release does not correctly update NPM package files

[adamretter]

After a performing a release there is also the issue that these two files are changed and unstaged and need to be manually committed and pushed separately - which breaks the atomic release commit concept:

diff --git a/package-lock.json b/package-lock.json
index 5f25e11..91b5029 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "exist-documentation",
-  "version": "5.4.1-SNAPSHOT",
+  "version": "6.1.0",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "exist-documentation",
-      "version": "5.4.1-SNAPSHOT",
+      "version": "6.1.0",
       "license": "LGPL-2.1-only",
       "dependencies": {
         "@neos21/bootstrap3-glyphicons": "^1.0.7",
diff --git a/package.json b/package.json
index 2e35c26..f1238cf 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "exist-documentation",
-  "version": "5.4.1-SNAPSHOT",
+  "version": "6.1.0",
   "description": "Documentation package for eXist-db",
   "scripts": {
     "test": "mocha src/test/mocha/ --recursive --exit",