not correctly remove attribute with string ends with 't'

[shoota]

string ends with 't' is removed 't' after translation in v0.2.1

source

<img src="foo" alt-t="foo.bar">

translated

<img src="foo" al="foo.bar">

reason

https://github.com/claudetech/node-static-i18n/blob/master/lib/index.js#L141

lodash.trimEnd will remove all string. ref

> lodash.trimEnd('content-t', '-t')
'conten'

[shoota]

I will send PR soon :)

[danhper]

Oh, I misunderstood how trimEnd works. Thank you, I'll be waiting for your PR.