Add support for v8-canary, nightly and rc (#655)

src/distributions/v8-canary/canary_builds.ts

@@ -0,0 +1,13 @@
+import BasePrereleaseNodejs from '../base-distribution-prerelease';
+import {NodeInputs} from '../base-models';
+
+export default class CanaryBuild extends BasePrereleaseNodejs {
+  protected distribution = 'v8-canary';
+  constructor(nodeInfo: NodeInputs) {
+    super(nodeInfo);
+  }
+
+  protected getDistributionUrl(): string {
+    return 'https://nodejs.org/download/v8-canary';
+  }
+}