fix token type

Author: Massimiliano Pippi

__tests__/main.test.ts

@@ -8,6 +8,7 @@ const toolDir = path.join(__dirname, "runner", "tools");
 const tempDir = path.join(__dirname, "runner", "temp");
 const dataDir = path.join(__dirname, "testdata");
 const IS_WINDOWS = process.platform === "win32";
+const GITHUB_TOKEN = process.env.GITHUB_TOKEN || "";
 
 process.env["RUNNER_TEMP"] = tempDir;
 process.env["RUNNER_TOOL_CACHE"] = toolDir;
@@ -31,7 +32,7 @@ describe("installer tests", () => {
   });
 
   it("Downloads version of protoc if no matching version is installed", async () => {
-    await installer.getProtoc("3.9.0", true, process.env["GITHUB_TOKEN"]);
+    await installer.getProtoc("3.9.0", true, GITHUB_TOKEN);
     const protocDir = path.join(toolDir, "protoc", "3.9.0", os.arch());
 
     expect(fs.existsSync(`${protocDir}.complete`)).toBe(true);
@@ -58,7 +59,7 @@ describe("installer tests", () => {
     });
 
     it("Gets the latest 3.7.x version of protoc using 3.7 and no matching version is installed", async () => {
-      await installer.getProtoc("3.7", true, process.env["GITHUB_TOKEN"]);
+      await installer.getProtoc("3.7", true, GITHUB_TOKEN);
       const protocDir = path.join(toolDir, "protoc", "3.7.1", os.arch());
 
       expect(fs.existsSync(`${protocDir}.complete`)).toBe(true);
@@ -72,7 +73,7 @@ describe("installer tests", () => {
     }, 100000);
 
     it("Gets latest version of protoc using 3.x and no matching version is installed", async () => {
-      await installer.getProtoc("3.x", true, process.env["GITHUB_TOKEN"]);
+      await installer.getProtoc("3.x", true, GITHUB_TOKEN);
       const protocDir = path.join(toolDir, "protoc", "3.9.1", os.arch());
 
       expect(fs.existsSync(`${protocDir}.complete`)).toBe(true);