Add forge support

.github/workflows/CI.yml

@@ -0,0 +1,25 @@
+name: CI
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  run-ci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: recursive
+      - uses: actions/setup-node@v2
+      - name: Install dev dependencies
+        run: npm install
+
+      - name: Install Foundry
+        uses: onbjerg/foundry-toolchain@v1
+        with:
+          version: nightly
+
+      - name: Run tests
+        run: forge test -f $JSON_RPC_URL

foundry.toml

@@ -0,0 +1,6 @@
+[default]
+src = 'contracts'
+out = 'out'
+libs = ['lib']
+
+# See more config options https://github.com/gakonst/foundry/tree/master/config

remappings.txt

@@ -1,4 +1,5 @@
 yamV3/=lib/yamV3/contracts/
 ds-test/=lib/ds-test/src/
-openzeppelin-contracts/=lib/openzeppelin-contracts/contracts/
-uma/=lib/uma/packages/core/contracts/
+@openzeppelin/=lib/openzeppelin-contracts/
+openzeppelin-contracts/=lib/openzeppelin-contracts/contracts
+uma/=lib/uma/packages/core/contracts/