chore: simplify Babel transform (#150)

The source contains no unsupported features except modules.

Author: ludofischer

.babelrc

@@ -1,20 +1,7 @@
 {
-  "presets": [
-    [
-      "@babel/preset-env",
-      {
-        "targets": {
-          "node": 10
-        }
-      }
-    ]
-  ],
+  "targets": {"node": "10.13.0"},
   "plugins": [
+    "@babel/plugin-transform-modules-commonjs",
     "add-module-exports"
-  ],
-  "env": {
-    "development": {
-      "sourceMaps": "inline"
-    }
-  }
+  ]
 }

package.json

@@ -37,7 +37,7 @@
     "@ava/babel": "^2.0.0",
     "@babel/cli": "^7.16.0",
     "@babel/core": "^7.16.5",
-    "@babel/preset-env": "^7.16.5",
+    "@babel/plugin-transform-modules-commonjs": "^7.16.5",
     "ava": "^3.15.0",
     "babel-plugin-add-module-exports": "^1.0.0",
     "eslint": "^8.5.0",