Move to GH Actions (#113)

* Move to GH Actions

* Configure cachix

Co-authored-by: grandizzy <grandizzy@localhost>

Author: gbalabasquer

.github/workflows/tests.yaml

@@ -0,0 +1,23 @@
+on: [push, pull_request]
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    - name: Install nix 2.3.6
+      uses: cachix/install-nix-action@v13
+      with:
+        install_url: https://releases.nixos.org/nix/nix-2.3.6/install
+        nix_path: nixpkgs=channel:nixos-unstable
+
+    - name: Use maker cachix
+      uses: cachix/cachix-action@v10
+      with:
+        name: maker
+        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+
+    - name: Run tests
+      run: nix-build -j2 | cachix push maker

.travis.yml

@@ -1,4 +1,5 @@
 # DSS deployment scripts
+![Build Status](https://github.com/makerdao/dss-deploy-scripts/actions/workflows/.github/workflows/tests.yaml/badge.svg?branch=master)
 
 A set of scripts that deploy [dss](http://github.com/makerdao/dss) to an
 Ethereum chain of your choosing.