added node version 14 to appveyor.yml

Author: JoshuaWise

.travis.yml

@@ -57,7 +57,6 @@ matrix:
       env:
         - CXX=g++
         - CC=gcc
-
     - name: "OS X - Node 14"
       os: osx
       node_js: "14"

appveyor.yml

@@ -3,6 +3,7 @@ environment:
   matrix:
     - nodejs_version: "10"
     - nodejs_version: "12"
+    - nodejs_version: "14"
 
 install:
   - ps: Install-Product node $env:nodejs_version

docs/troubleshooting.md

@@ -10,7 +10,7 @@ If you have trouble installing `better-sqlite3`, follow this checklist:
 
 4. If you're using Windows, follow these steps. Do them **in this order**, and **don't skip steps**.
 
-    1. Install the **latest** of node 10 or node 12.
+    1. Install the **latest** of node 10, 12, or 14.
     2. Start an Admin PowerShell: Right-click the start icon, then pick `Windows PowerShell (Admin)`
     3. Install *both* vs2015 and vs2017 libraries. Each line will take ~5-10 minutes.
        ```sh