Fix bug. Add workflows.

lib/installer.js

@@ -20,7 +20,7 @@ const exec = __importStar(require("@actions/exec"));
 const tc = __importStar(require("@actions/tool-cache"));
 const path = __importStar(require("path"));
 const IS_WINDOWS = process.platform === 'win32';
-function default_1(version) {
+function findRubyVersion(version) {
     return __awaiter(this, void 0, void 0, function* () {
         const installDir = tc.find('Ruby', version);
         if (!installDir) {
@@ -37,4 +37,4 @@ function default_1(version) {
         core.addPath(toolPath);
     });
 }
-exports.default = default_1;
+exports.findRubyVersion = findRubyVersion;