Upgrade to newest swc for performance

This also removes a now-erroneous case of SWC config where the env and target options conflict. Let's stick with target, it seems to be preferred internally by swc.

.swcrc

@@ -1,9 +1,4 @@
 {
-  "env": {
-    "targets": {
-      "node": 18
-    }
-  },
   "jsc": {
     "parser": {
       "syntax": "typescript",

Readme.md

@@ -72,11 +72,6 @@ module.exports = {
 
 ```json
 {
-  "env": {
-    "targets": {
-      "node": 16
-    }
-  },
   "jsc": {
     "parser": {
       "syntax": "typescript",
@@ -124,18 +119,13 @@ And then, you can use `swc`'s standard syntax for the `.swcrc` file
 ```json
 // in .swcrc, these are the defaults wds uses
 {
-  "env": {
-    "targets": {
-      "node": 16
-    }
-  },
   "jsc": {
     "parser": {
       "syntax": "typescript",
       "decorators": true,
       "dynamicImport": true
     },
-    "target": "es2020"
+    "target": "es2022"
   },
   "module": {
     "type": "commonjs",

package.json

@@ -38,7 +38,7 @@
   },
   "dependencies": {
     "@cspotcode/source-map-support": "^0.8.1",
-    "@swc/core": "^1.3.58",
+    "@swc/core": "^1.3.82",
     "chokidar": "^3.5.3",
     "find-root": "^1.1.0",
     "find-yarn-workspace-root": "^2.0.0",