fix: add "runtime.d.ts" to allow "require('handlebars/runtime')"
fix: add "runtime.d.ts" to allow "require('handlebars/runtime')"

see #1499

mosoft521/handlebars.js,mosoft521/handlebars.js,handlebars-lang/handlebars.js,gautamkrishnar/handlebars.js,wycats/handlebars.js,wycats/handlebars.js,wycats/handlebars.js,handlebars-lang/handlebars.js,mosoft521/handlebars.js,wycats/handlebars.js,jbboehr/handlebars.js,mosoft521/handlebars.js,jbboehr/handlebars.js,wycats/handlebars.js,gautamkrishnar/handlebars.js,mosoft521/handlebars.js,jbboehr/handlebars.js,handlebars-lang/handlebars.js,handlebars-lang/handlebars.js,gautamkrishnar/handlebars.js,handlebars-lang/handlebars.js