Revert "Bump learna from 2.11 to 3.22.1"

This reverts commit 5ff3923.

Fixes #83

Signed-off-by: Bernd Hufmann <Bernd.Hufmann@ericsson.com>

lerna.json

@@ -1,5 +1,5 @@
 {
-  "lerna": "3.22.1",
+  "lerna": "2.11.0",
   "version": "0.1.0",
   "useWorkspaces": true,
   "npmClient": "yarn",

package.json

@@ -9,7 +9,7 @@
         "start": "lerna run start",
         "test": "echo 'Should run tests'",
         "publish:latest": "lerna publish --registry=https://registry.npmjs.org/ --exact --no-git-tag-version --no-push",
-        "publish:next": "lerna publish --registry=https://registry.npmjs.org/ --exact --canary --preid=next --dist-tag=next --no-git-tag-version --no-push --yes"
+        "publish:next": "lerna publish --registry=https://registry.npmjs.org/ --exact --canary=next --npm-tag=next --skip-git --yes"
     },
     "keywords": [
         "gantt",
@@ -27,7 +27,7 @@
     "homepage": "https://github.com/theia-ide/timeline-chart",
     "devDependencies": {
         "@types/pixi.js": "^5.0.0",
-        "lerna": "3.22.1",
+        "lerna": "2.11.0",
         "typescript": "^3.2.2"
     },
     "workspaces": [