feat: export OperatorMap type

src/types.ts

@@ -19,3 +19,4 @@ export { Tokenizer } from './parser/tokenizer'
 export { Hash } from './template/tag/hash'
 export { evalToken, evalQuotedToken } from './render/expression'
 export { toPromise, toThenable, toValue } from './util/async'
+export { OperatorMap } from './render/operator'