Lower dependency to .NET Standard 1.5

lower to net standard 1.5 (#5)

* cake and lower net standard

* gitversion fix

* nuget pack

* script must be ps1

v0.2: Net standard 2.0 (#4)

Fix issue with parsing upper case templates (#3)
Support .NET Standard (#4)

Build fix release

v0.1.1

add some negative tests

Initial release

Implemented parsing according to spec and basic operations on templates

First beta

show the right icon

[skip ci]