React 19 Support

[tordans]

Testing a Astro + Keystatic Setup with React 19 I get a few warnings, some of them related to Keystatic:

npm warn Could not resolve dependency:
npm warn peer react@"^18.2.0" from @keystatic/[email protected]
npm warn node_modules/@keystatic/astro
npm warn   @keystatic/astro@"^5.0.3" from the root project
npm warn ERESOLVE overriding peer dependency
npm warn While resolving: [email protected]
npm warn Found: [email protected]
npm warn node_modules/react
npm warn   react@"^19.0.0" from the root project
npm warn   113 more (@astrojs/react, @floating-ui/react, ...)
npm warn
npm warn Could not resolve dependency:
npm warn peer react@"^18.2.0" from @keystatic/[email protected]
npm warn node_modules/@keystatic/core
npm warn   @keystatic/core@"^0.5.42" from the root project
npm warn   1 more (@keystatic/astro)
npm warn ERESOLVE overriding peer dependency
npm warn While resolving: [email protected]
npm warn Found: [email protected]
npm warn node_modules/react
npm warn   react@"^19.0.0" from the root project
npm warn   113 more (@astrojs/react, @floating-ui/react, ...)
npm warn
npm warn Could not resolve dependency:
npm warn peer react@"^18.2.0" from @keystatic/[email protected]
npm warn node_modules/@keystatic/core
npm warn   @keystatic/core@"^0.5.42" from the root project
npm warn   1 more (@keystatic/astro)
npm warn ERESOLVE overriding peer dependency
npm warn While resolving: [email protected]
npm warn Found: [email protected]
npm warn node_modules/react
npm warn   react@"^19.0.0" from the root project
npm warn   113 more (@astrojs/react, @floating-ui/react, ...)
…
npm warn Could not resolve dependency:
npm warn peer react-dom@"^18.2.0" from @keystatic/[email protected]
npm warn node_modules/@keystatic/astro
npm warn   @keystatic/astro@"^5.0.3" from the root project
npm warn ERESOLVE overriding peer dependency
npm warn While resolving: [email protected]
npm warn Found: [email protected]
npm warn node_modules/react-dom
npm warn   react-dom@"^19.0.0" from the root project
npm warn   31 more (@astrojs/react, @floating-ui/react, ...)
npm warn
npm warn Could not resolve dependency:
npm warn peer react-dom@"^18.2.0" from @keystatic/[email protected]
npm warn node_modules/@keystatic/core
npm warn   @keystatic/core@"^0.5.42" from the root project
npm warn   1 more (@keystatic/astro)
npm warn ERESOLVE overriding peer dependency
npm warn While resolving: [email protected]
npm warn Found: [email protected]
npm warn node_modules/react-dom
npm warn   react-dom@"^19.0.0" from the root project
npm warn   31 more (@astrojs/react, @floating-ui/react, ...)
npm warn
npm warn Could not resolve dependency:
npm warn peer react-dom@"^18.2.0" from @keystatic/[email protected]
npm warn node_modules/@keystatic/core
npm warn   @keystatic/core@"^0.5.42" from the root project
npm warn   1 more (@keystatic/astro)

And errors:

% npm install
npm error code ERESOLVE
npm error ERESOLVE could not resolve
npm error
npm error While resolving: @keystatic/[email protected]
npm error Found: [email protected]
npm error node_modules/react
npm error   react@"^19.0.0" from the root project
npm error   peer react@"^17.0.2 || ^18.0.0 || ^19.0.0-beta" from @astrojs/[email protected]
npm error   node_modules/@astrojs/react
npm error     @astrojs/react@"^4.0.0" from the root project
npm error   107 more (@floating-ui/react, @floating-ui/react-dom, ...)
npm error
npm error Could not resolve dependency:
npm error peer react@"^18.2.0" from @keystatic/[email protected]
npm error node_modules/@keystatic/astro
npm error   @keystatic/astro@"^5.0.3" from the root project
npm error
npm error Conflicting peer dependency: [email protected]
npm error node_modules/react
npm error   peer react@"^18.2.0" from @keystatic/[email protected]
npm error   node_modules/@keystatic/astro
npm error     @keystatic/astro@"^5.0.3" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.

diff --git a/package-lock.json b/package-lock.json
index 727e546..2ef53e6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,8 +31,8 @@
         "maplibre-gl": "^4.7.1",
         "nanostores": "^0.11.3",
         "pmtiles": "^4.0.1",
-        "react": "^18.3.1",
-        "react-dom": "^18.3.1",
+        "react": "^19.0.0",
+        "react-dom": "^19.0.0",