Update CI workflow to use top level

Author: srchase

.github/workflows/ci.yml

@@ -37,9 +37,9 @@ jobs:
         with:
           node-version: '14'
       - name: Install dependencies
-        run: cd smithy-typescript-ssdk-libs && yarn
+        run: yarn
       - name: Run eslint
-        run: cd smithy-typescript-ssdk-libs && yarn lint
+        run: yarn lint
 
   test-typescript:
     runs-on: ubuntu-latest
@@ -50,9 +50,9 @@ jobs:
         with:
           node-version: '14'
       - name: Install dependencies
-        run: cd smithy-typescript-ssdk-libs && yarn
+        run: yarn
       - name: Run tests
-        run: cd smithy-typescript-ssdk-libs && yarn test
+        run: yarn test
 
   ensure-typescript-formatted:
     runs-on: ubuntu-latest
@@ -63,9 +63,9 @@ jobs:
         with:
           node-version: '14'
       - name: Install dependencies
-        run: cd smithy-typescript-ssdk-libs && yarn
+        run: yarn
       - name: Run the code formatter
-        run: cd smithy-typescript-ssdk-libs && yarn format
+        run: yarn format
       # This checks the output of git diff. If it's not empty (i.e there were
       # changes) it'll return a non-zero error code.
       - name: Ensure there are no changes from running the formatter