fix: coverage fix

Author: brianleroux

package.json

@@ -12,7 +12,7 @@
     "test:unit": "AWS_ACCESS_KEY_ID=\"blah\" AWS_SECRET_ACCESS_KEY=\"blah\" node --test --test-reporter=spec 'test/unit/**/*-test.js'",
     "test:slow": "node --test --test-reporter=spec 'test/slow/**/*-test.js'",
     "test:integration": "AWS_ACCESS_KEY_ID=\"blah\" AWS_SECRET_ACCESS_KEY=\"blah\" node --test --test-reporter=spec 'test/integration/**/*-test.js'",
-    "coverage": "AWS_ACCESS_KEY_ID=\"blah\" AWS_SECRET_ACCESS_KEY=\"blah\" node --test --experimental-test-coverage --test-reporter=spec --test-reporter-destination=stdout --test-reporter=lcov --test-reporter-destination=coverage/lcov.info 'test/unit/**/*-test.js'",
+    "coverage": "mkdir -p coverage && AWS_ACCESS_KEY_ID=\"blah\" AWS_SECRET_ACCESS_KEY=\"blah\" node --test --experimental-test-coverage --test-reporter=spec --test-reporter-destination=stdout --test-reporter=lcov --test-reporter-destination=coverage/lcov.info 'test/unit/**/*-test.js'",
     "lint": "eslint . --fix",
     "rc": "npm version prerelease --preid RC"
   },