[year] is the year copyright was applied. If you apply the copyright (which happens automatically when you write the work) in 2012, put in 2012. Though some projects uses a range of years (i.e. 2012-2019), but it is neither necessary nor effective (as it obviously requires edition of license EVERY new years.) (ref: https://opensource.stackexchange.com/questions/1522/what-should-be-written-in-mit-license-year-full-name)
However, this PR just respect your preference, so updated the year range to 2012 - 2019. But I personally strongly recommend just fix it to 2012 if you think it's rational.
[year] is the year copyright was applied. If you apply the copyright (which happens automatically when you write the work) in 2012, put in 2012. Though some projects uses a range of years (i.e. 2012-2019), but it is neither necessary nor effective (as it obviously requires edition of license EVERY new years.) (ref: https://opensource.stackexchange.com/questions/1522/what-should-be-written-in-mit-license-year-full-name)
However, this PR just respect your preference, so updated the year range to
2012 - 2019. But I personally strongly recommend just fix it to 2012 if you think it's rational.