Relative patterns and paths with dot in the base name

Relative patterns and paths with dot in the base name

The `isMatch` method always returns `true` for files starting with a period if a relative path is used. The `dot` option has no effect here.

```js
const picomatch = require('picomatch');

const isMatch = picomatch('../*.js');
const result = isMatch('../.test.js');

console.log(result); // true
```

Comparing behavior with micromatch:

```js
const picomatch = require('picomatch');
const micromatch = require('micromatch');

const pico = picomatch('../*.js');
const micro = micromatch.isMatch('../.test.js', '../*.js');

console.log(pico('../.test.js')); // true
console.log(micro); // false Will be `true` with { dot: true }
```