Run on Node 20.x (#16)

Also move to @clechasseur/rs-actions-core for more up-to-date dependencies

src/main.ts

@@ -4,7 +4,7 @@ import * as os from 'os';
 import * as core from '@actions/core';
 import * as github from '@actions/github';
 
-import { Cargo } from '@rinse-repeat/actions-rs-core';
+import { Cargo } from '@clechasseur/rs-actions-core';
 
 import * as input from './input';
 import * as interfaces from './interfaces';
@@ -100,7 +100,7 @@ async function main(): Promise<void> {
         const actionInput = input.get();
         await run(actionInput);
     } catch (error) {
-        core.setFailed(error.message);
+        core.setFailed((error as Error).message);
     }
 
     return;