Stop ESLint from complaining about a "user-supplied" filename

When reading the config file, GitGitGadget accepts the file name as
input variable. But this is still far from under the control of an
attacker... ESLint cannot know that, so let's help it out here.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

lib/project-config.ts

@@ -80,6 +80,7 @@ export async function loadConfig(file: string): Promise<IConfig> {
         const { default: newConfig } = (await import(file)) as importedConfig;
         loadedConfig = newConfig;
     } else {
+        // eslint-disable-next-line security/detect-non-literal-fs-filename
         const fileText = fs.readFileSync(file, { encoding: "utf-8" });
         loadedConfig = JSON.parse(fileText) as IConfig;
     }