build: Node.js@10.21

Author: dougwilson

.travis.yml

@@ -14,7 +14,7 @@ node_js:
   - "7.10"
   - "8.17"
   - "9.11"
-  - "10.19"
+  - "10.21"
   - "11.15"
   - &lts "12.16"
   - "13.13"

appveyor.yml

@@ -19,7 +19,7 @@ environment:
     - nodejs_version: "7.10"
     - nodejs_version: "8.17"
     - nodejs_version: "9.11"
-    - nodejs_version: "10.19"
+    - nodejs_version: "10.21"
     - nodejs_version: "11.15"
     - nodejs_version: "12.16"
     - nodejs_version: "13.13"