update CI

Author: nitely

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         # xxx trim to on use latest in each branch eg 1.0.10, 1.2.8 etc
-        nim: [1.0.0, 1.0.2, 1.0.4, 1.0.10, 1.2.0, 1.2.2, 1.2.4, 1.2.6, 1.2.8, 1.4.0, 1.4.2, 1.4.4]
+        nim: [1.0.0, 1.0.2, 1.0.4, 1.0.10, 1.2.0, 1.2.2, 1.2.4, 1.2.6, 1.2.18, 1.4.0, 1.4.2, 1.4.8, 1.6.14, 2.0.0]
     steps:
     - uses: actions/checkout@v2
     - name: Run Tests