Update lerna and minimum node version

- Update to lerna 6 and set node 14 as minimum engine version
eclipse-glsp/glsp#676
eclipse-glsp/glsp#676
- Update jenkins file to ensure that we don't exhaust resource limits
eclipse-glsp/glsp#794

Jenkinsfile

@@ -4,7 +4,7 @@ kind: Pod
 spec:
   containers:
   - name: node
-    image: node:12.22.10
+    image: node:14
     tty: true
     resources:
       limits:
@@ -94,7 +94,7 @@ pipeline {
                 }
             }
             steps {
-                build job: 'deploy-npm-glsp-client', wait: false
+                build job: 'deploy-npm-glsp-client', wait: true
             }
         }
     }

package.json

@@ -3,7 +3,8 @@
   "name": "parent",
   "version": "1.0.0",
   "engines": {
-    "yarn": ">=1.7.0 <2.x.x"
+    "yarn": ">=1.7.0 <2.x.x",
+    "node": ">=14.18.0"
   },
   "scripts": {
     "prepare": "lerna run prepare",
@@ -21,9 +22,9 @@
     "download:exampleServer": "ts-node examples/workflow-glsp/scripts/download.ts"
   },
   "devDependencies": {
-    "@eclipse-glsp/config": "^1.0.0",
-    "@types/node": "12.x",
-    "lerna": "^4.0.0",
+    "@eclipse-glsp/config": "1.1.0-next.d03ad9f.112",
+    "@types/node": "14",
+    "lerna": "^6.1.0",
     "reflect-metadata": "^0.1.13",
     "rimraf": "^3.0.2",
     "typescript": "~4.5.5"