feat: node 15 support

Fixes elastic#1840

Author: kevcodez

.ci/.jenkins_nightly_nodejs.yml

@@ -1,4 +1,5 @@
 NODEJS_VERSION:
+  - "15"
   - "14"
   - "13"
   - "12"

.ci/.jenkins_nodejs.yml

@@ -1,4 +1,5 @@
 NODEJS_VERSION:
+  - "15"
   - "14"
   - "14.0"
   - "13"

.ci/.jenkins_rc_nodejs.yml

@@ -1,4 +1,5 @@
 NODEJS_VERSION:
+  - "15"
   - "14"
   - "13"
   - "12"

.ci/.jenkins_tav_nodejs.yml

@@ -1,4 +1,5 @@
 NODEJS_VERSION:
+  - "15"
   - "14"
   - "13"
   - "12"

.travis.yml

@@ -42,6 +42,7 @@ before_script:
   - wait-on tcp:9200
 
 node_js:
+  - '15'
   - '14'
   - '14.0'
   - '13'
@@ -57,6 +58,9 @@ jobs:
 
   include:
     # Disable Async Hooks
+    -
+      node_js: '15'
+      env: ELASTIC_APM_ASYNC_HOOKS=false
     -
       node_js: '14'
       env: ELASTIC_APM_ASYNC_HOOKS=false

package.json

@@ -45,7 +45,7 @@
     "url": "git://github.com/elastic/apm-agent-nodejs.git"
   },
   "engines": {
-    "node": "^8.6.0 || 10 || 12 || 13 || 14"
+    "node": "^8.6.0 || 10 || 12 || 13 || 14 || 15"
   },
   "keywords": [
     "opbeat",
@@ -145,7 +145,7 @@
     "generic-pool": "^3.7.1",
     "get-port": "^5.1.1",
     "got": "^9.6.0",
-    "graphql": "^15.3.0",
+    "graphql": "^14.7.0",
     "handlebars": "^4.7.3",
     "hapi": "^18.1.0",
     "https-pem": "^2.0.0",