fix source maps (#3483)

Co-authored-by: Will Cory <willcory@Wills-MacBook-Pro.local>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

.changeset/spicy-pianos-grow.md

+---
+'@eth-optimism/common-ts': patch
+'@eth-optimism/sdk': patch
+---
+
+Add source maps

packages/common-ts/package.json

@@ -5,7 +5,8 @@
   "main": "dist/index",
   "types": "dist/index",
   "files": [
-    "dist/*"
+    "dist/*",
+    "src/*"
   ],
   "scripts": {
     "all": "yarn clean && yarn build && yarn test && yarn lint:fix && yarn lint",

packages/sdk/package.json

@@ -5,7 +5,8 @@
   "main": "dist/index",
   "types": "dist/index",
   "files": [
-    "dist/*"
+    "dist/*",
+    "src/*"
   ],
   "scripts": {
     "all": "yarn clean && yarn build && yarn test && yarn lint:fix && yarn lint",