[lerna] upgrade to recent version

Fixes #262

Updated lerna from v4.x to 7.x, getting rid of several big security
vulnerabilities, that were present in the older version.

Signed-off-by: Marc Dumais <marc.dumais@ericsson.com>

lerna.json

@@ -1,7 +1,6 @@
 {
-  "lerna": "4.0.0",
+  "lerna": "7.3.0",
   "version": "0.2.0",
-  "useWorkspaces": true,
   "npmClient": "yarn",
   "command": {
     "run": {

package.json

@@ -26,9 +26,8 @@
     },
     "homepage": "https://github.com/theia-ide/timeline-chart",
     "devDependencies": {
-        "@types/pixi.js": "^5.0.0",
-        "lerna": "4.0.0",
-        "typescript": "latest"
+        "lerna": "^7.0.0",
+        "typescript": "^5.2.2"
     },
     "workspaces": [
         "timeline-chart",

timeline-chart/package.json

@@ -25,6 +25,6 @@
     "enzyme-adapter-react-16": "^1.15.6",
     "jest": "^27.4.3",
     "jest-canvas-mock": "^2.3.1",
-    "ts-jest": "^27.0.7"
+    "ts-jest": "^29.0.0"
   }
 }