Currently with TypeScript, if I create two files and put `const foo = "bar";` in each, I will get the following error:  For the specific environment I'm using, this is not the case at runtime. I'd like to silence this error with a tsconfig.json option. One current workaround is to put `export {};` in all my files to instruct TypeScript that the file is a module, but I'd like to avoid doing so.