feat: Add disable_nojekyll and cname options (#119)

* feat: Add disable_nojekyll and cname options
* docs: Add cname and disable_nojekyll
* chore: Add vim
* chore(release): 3.3.0-0
* ci: Add codecov/codecov-action
* refactor: Enhance warning message

- Add .nojekyll file by default to only the master and gh-pages branches. When the file already exists, this action does nothing.
- When we set other branches to publish_branch, this action does not add .nojekyll file.

cf. https://github.com/peaceiris/actions-gh-pages/issues/112#issuecomment-589678269

Close #112

Co-authored-by: Daniel Himmelstein <daniel.himmelstein@gmail.com>
Co-authored-by: Nicolas Vanhoren <nicolas.vanhoren@gmail.com>

src/git-utils.ts

@@ -5,13 +5,7 @@ import * as io from '@actions/io';
 import path from 'path';
 import fs from 'fs';
 import {Inputs, CmdResult} from './interfaces';
-import {getHomeDir} from './utils';
-
-export async function createWorkDir(workDirName: string): Promise<void> {
-  await io.mkdirP(workDirName);
-  core.debug(`workDir was created: ${workDirName}`);
-  return;
-}
+import {createWorkDir} from './utils';
 
 export async function createBranchForce(branch: string): Promise<void> {
   await exec.exec('git', ['init']);
@@ -41,9 +35,8 @@ export async function copyAssets(
 export async function setRepo(
   inps: Inputs,
   remoteURL: string,
-  unixTime: string
+  workDir: string
 ): Promise<void> {
-  const workDir = path.join(getHomeDir(), `actions_github_pages_${unixTime}`);
   const publishDir = path.join(
     `${process.env.GITHUB_WORKSPACE}`,
     inps.PublishDir