Make filter optional

[OliverJAsh]

Fixes #52

[ci-reporter]

The build is failing

✨ Good work on this PR so far! ✨ Unfortunately, the Travis CI build is failing as of eb2a448. Here's the output:

npm test

> shrink-ray-current@4.1.2 test /home/travis/build/Alorel/shrink-ray
> nyc mocha --check-leaks --bail

/home/travis/build/Alorel/shrink-ray/node_modules/yargs/yargs.js:1163
      else throw err
           ^

Error: The module '/home/travis/build/Alorel/shrink-ray/node_modules/iltorb/build/bindings/iltorb.node'
was compiled against a different Node.js version using
NODE_MODULE_VERSION 79. This version of Node.js requires
NODE_MODULE_VERSION 83. Please try re-compiling or re-installing
the module (for instance, using `npm rebuild` or `npm install`).
    at Object.Module._extensions..node (internal/modules/cjs/loader.js:1226:18)
    at Module.load (internal/modules/cjs/loader.js:1040:32)
    at Function.Module._load (internal/modules/cjs/loader.js:929:14)
    at Module.require (internal/modules/cjs/loader.js:1080:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/home/travis/build/Alorel/shrink-ray/node_modules/iltorb/index.js:10:40)
    at Module._compile (internal/modules/cjs/loader.js:1176:30)
    at Module.replacementCompile (/home/travis/build/Alorel/shrink-ray/node_modules/append-transform/index.js:60:13)
    at Module._extensions..js (internal/modules/cjs/loader.js:1196:10)
    at Object.<anonymous> (/home/travis/build/Alorel/shrink-ray/node_modules/append-transform/index.js:64:4)
    at Module.load (internal/modules/cjs/loader.js:1040:32)
    at Function.Module._load (internal/modules/cjs/loader.js:929:14)
    at Module.require (internal/modules/cjs/loader.js:1080:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object.<anonymous> (/home/travis/build/Alorel/shrink-ray/test/compression.js:7:16)
    at Module._compile (internal/modules/cjs/loader.js:1176:30)
    at Module.replacementCompile (/home/travis/build/Alorel/shrink-ray/node_modules/append-transform/index.js:60:13)
    at Module._extensions..js (internal/modules/cjs/loader.js:1196:10)
    at Object.<anonymous> (/home/travis/build/Alorel/shrink-ray/node_modules/append-transform/index.js:64:4)
    at Module.load (internal/modules/cjs/loader.js:1040:32)
    at Function.Module._load (internal/modules/cjs/loader.js:929:14)
    at Module.require (internal/modules/cjs/loader.js:1080:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at /home/travis/build/Alorel/shrink-ray/node_modules/mocha/lib/mocha.js:334:36
    at Array.forEach (<anonymous>)
    at Mocha.loadFiles (/home/travis/build/Alorel/shrink-ray/node_modules/mocha/lib/mocha.js:331:14)
    at Mocha.run (/home/travis/build/Alorel/shrink-ray/node_modules/mocha/lib/mocha.js:811:10)
    at Object.exports.singleRun (/home/travis/build/Alorel/shrink-ray/node_modules/mocha/lib/cli/run-helpers.js:108:16)
    at exports.runMocha (/home/travis/build/Alorel/shrink-ray/node_modules/mocha/lib/cli/run-helpers.js:142:13)
    at Object.exports.handler (/home/travis/build/Alorel/shrink-ray/node_modules/mocha/lib/cli/run.js:292:3)
    at Object.runCommand (/home/travis/build/Alorel/shrink-ray/node_modules/yargs/lib/command.js:242:26)
    at Object.parseArgs [as _parseArgs] (/home/travis/build/Alorel/shrink-ray/node_modules/yargs/yargs.js:1104:24)
    at Object.parse (/home/travis/build/Alorel/shrink-ray/node_modules/yargs/yargs.js:566:25)
    at Object.exports.main (/home/travis/build/Alorel/shrink-ray/node_modules/mocha/lib/cli/cli.js:68:6)
    at Object.<anonymous> (/home/travis/build/Alorel/shrink-ray/node_modules/mocha/bin/mocha:164:29)
    at Module._compile (internal/modules/cjs/loader.js:1176:30)
    at Module.replacementCompile (/home/travis/build/Alorel/shrink-ray/node_modules/append-transform/index.js:60:13)
    at Module._extensions..js (internal/modules/cjs/loader.js:1196:10)
    at Object.<anonymous> (/home/travis/build/Alorel/shrink-ray/node_modules/append-transform/index.js:64:4)
    at Module.load (internal/modules/cjs/loader.js:1040:32)
    at Function.Module._load (internal/modules/cjs/loader.js:929:14)
    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)
    at internal/main/run_main_module.js:17:47
----------|---------|----------|---------|---------|-------------------
File      | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
----------|---------|----------|---------|---------|-------------------
All files |       0 |        0 |       0 |       0 |                   
----------|---------|----------|---------|---------|-------------------

=============================== Coverage summary ===============================
Statements   : Unknown% ( 0/0 )
Branches     : Unknown% ( 0/0 )
Functions    : Unknown% ( 0/0 )
Lines        : Unknown% ( 0/0 )
================================================================================

I'm sure you can fix it! If you need help, don't hesitate to ask a maintainer of the project!

---

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[Evertt]

Will this get fixed any time soon? 😇

[cooljeffro]

any chance this will get released?