Add components support as an input

src/main.ts

@@ -6,11 +6,19 @@ import * as os from 'os';
 async function run() {
   try {
     const version = core.getInput('rust-version');
+    const components = core.getInput('components')
+      .split(',')
+      .map((component) => component.trim())
+      .filter((component) => component.length > 0);
 
     if(version) {
       await rustup.install();
       await exec.exec('rustup', ['default', version]);
       await exec.exec('rustup', ['update', version]);
+
+      for(let component of components) {
+        await exec.exec('rustup', ['component', 'add', component]);
+      }
     }
   } catch (error) {
     core.setFailed(error.message);