fix: fix Yarn peer dependency warning from @babel/core (#786)

Installing @svgr/core with Yarn Modern (Yarn 2+) gives the following warning:

```
➤ YN0002: │ @svgr/core@npm:6.4.0 doesn't provide @babel/core (p0b84c), requested by @svgr/babel-preset
```

Fixes #785

Author: joshkel

package-lock.json

@@ -38,6 +38,7 @@
     "prepublishOnly": "npm run reset && npm run build"
   },
   "dependencies": {
+    "@babel/core": "^7.18.5",
     "@svgr/babel-preset": "^6.4.0",
     "@svgr/plugin-jsx": "^6.4.0",
     "camelcase": "^6.2.0",