Sort log entries chronologically before calling PutLogEvents.

[KiNgMaR]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

Bug fix.

• What is the current behavior?

See issues #32 and #69.

• What is the new behavior (if this is a feature change)?

Chronological order of log entries is ensured before submission.

• Does this PR introduce a breaking change?

No.

• Other information:

The comparison logic is the fastest one still supported on PHP 5.6. The spaceship operator seems to be a little bit faster, but not available in PHP 5.

[coveralls]

Coverage decreased (-0.5%) to 91.586% when pulling 1890a23fe98664a67d88b89f31e0a4ff2f6afd7f on KiNgMaR:Sort-Before-Submission into f53e83ec6bd6cbdd7cbed8817a5b2d3ebcf278cd on maxbanton:master.

[coveralls]

Coverage decreased (-0.7%) to 91.388% when pulling 1890a23fe98664a67d88b89f31e0a4ff2f6afd7f on KiNgMaR:Sort-Before-Submission into f53e83ec6bd6cbdd7cbed8817a5b2d3ebcf278cd on maxbanton:master.