Assumption on numeric parts being 32-bit integers is insufficient

[yalinhuang]

It is not uncommon to attach timestamps to the "prerelease" part of package version strings. Here is an example -- https://registry.npmjs.org/puppeteer/1.3.0-next.1524774887046

The timestamp is in the unit of microsecond, and hence exceeds the boundary of Integer.MAX_VALUE. Feeding the above example into Version.from() results in this exception:

Caused by: java.lang.NumberFormatException: For input string: "1524774887046"
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:583)
	at java.lang.Integer.parseInt(Integer.java:615)
	at com.github.yuchi.semver.Version.<init>(Version.java:81)
	at com.github.yuchi.semver.Version.<init>(Version.java:32)

Using Long may solve the issue. Or all numeric parts in a version string should stay in string data type.

[yuchi]

Thank you @yalinhuang, you are absolutely right.
Would you be so kind to send a PR to solve this?

[yuchi]

Also please update the test cases!

[yalinhuang]

My pleasure. Here's a quick patch.