Add test action to ensure functionality on Linux and Windows.

.github/workflows/test.yml

@@ -0,0 +1,26 @@
+name: Test
+
+on:
+  push:
+  pull_request:
+
+jobs:
+
+  build_linux:
+    name: Build Linux
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: |
+        sudo apt-get update
+        sudo apt-get install -y libspeechd-dev
+        cargo build --release --verbose
+
+  build_windows:
+    name: Build Windows
+    runs-on: windows-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: |
+        choco install -y llvm
+        cargo build --release --verbose