chore(deps): bump ep_plugin_helpers to ^0.6.0 (#153)

* chore(deps): bump ep_plugin_helpers to ^0.6.0

0.6.x is the current line on npm (latest = 0.6.2) and the prior range
doesn't resolve to it under caret semver for pre-1.0. Without this bump,
fresh installs of this plugin pull a stale ep_plugin_helpers and miss
fixes shipped in 0.6.x — including ether/ep_plugin_helpers#19 which
corrected the misleading "Etherpad < 2.7.4" degradation warning.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* chore(deps): regenerate pnpm-lock.yaml for ep_plugin_helpers bump

Required so the release workflow's `pnpm i --frozen-lockfile` step
doesn't fail with ERR_PNPM_OUTDATED_LOCKFILE after merge.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: JohnMcLear

package.json

@@ -19,7 +19,7 @@
     "url": "https://etherpad.org/"
   },
   "dependencies": {
-    "ep_plugin_helpers": "^0.5.2"
+    "ep_plugin_helpers": "^0.6.0"
   },
   "devDependencies": {
     "eslint": "^8.57.1",