fix: relayer workflow builds sdk before building itself (#69)

This is a temporary solution until there's a published package for the
sdk. Once that's done, we'll be able to download the sdk as any other
dependency.

.github/workflows/relayer.yml

@@ -27,6 +27,9 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: Build sdk
+        run: cd ../sdk && yarn install && yarn build
+
       - name: Install dependencies
         run: yarn --frozen-lockfile --network-concurrency 1
 
@@ -52,4 +55,4 @@ jobs:
         run: yarn install --frozen-lockfile
 
       - name: Run tests with coverage
-        run: yarn test:cov 
+        run: yarn test:cov