1.3.1: Merge pull request #3 from Timanx/master

fix marking the last message priority

1.3.0: Merge pull request #2 from Timanx/master

Ignore the interval if a higher priority error than the last is thrown

1.2.1

refactor isset() checks to ===null tests, fix printing number of seco…

1.2.0

fix indentation

Update for PHP 7 Throwables

1.1.3

update for PHP 7 Throwables

1.1.2

fix processing response from Slack

1.1.1

fix the installation instructions

1.1.0: Configurable channel to post the message to.

The 1.1.0 introduces new features:

• Configurable channel to post the message to.
• Configurable username to post the message as.
• Configurable icon_emoji to post the message with.
• Configurable message pretext.
• Color message according to the priority.
• Treat the logUrl configuration as optional.

Backwards-compatible with 1.0.