updated github actions

.github/workflows/build.yml

@@ -1,26 +1,16 @@
-name: Run tests
+name: Github Actions
 on: [push, pull_request]
 jobs:
   build:
-    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+
+    runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v1
-
-    - name: Cache choosenim
-      id: cache-choosenim
-      uses: actions/cache@v1
-      with:
-        path: ~/.choosenim
-        key: ${{ runner.os }}-choosenim-stable
-
-    - name: Cache nimble
-      id: cache-nimble
-      uses: actions/cache@v1
-      with:
-        path: ~/.nimble
-        key: ${{ runner.os }}-nimble-stable
-
+    - uses: actions/checkout@v2
     - uses: jiro4989/setup-nim-action@v1
-
     - run: nimble test -y
+    - run: nimble test --gc:orc -y

README.md

@@ -2,6 +2,8 @@
 
 # VMath
 
+![Github Actions](https://github.com/treeform/vmath/workflows/Github%20Actions/badge.svg)
+
 `nimble install vmath`
 
 Your one stop shop for vector math routines for 2d and 3d graphics.