src: don't use deprecated v8::Template::Set()
src: don't use deprecated v8::Template::Set()

See [0] and [1]: starting with node.js v6, setting non-primitive values
on FunctionTemplate and ObjectTemplate instances is discouraged; v7 will
downright disallow it. Update the code base.

[0] https://github.com/nodejs/node/issues/6216
[1] https://github.com/nodejs/node/pull/6228

alexandrudima/node-oniguruma,bpasero/node-oniguruma,alexandrudima/node-oniguruma,bpasero/node-oniguruma,bpasero/node-oniguruma,atom/node-oniguruma,atom/node-oniguruma,alexandrudima/node-oniguruma,atom/node-oniguruma