feat: export error types, resolving #837 (#840)

Author: harttle

src/index.ts

@@ -2,16 +2,20 @@
 export const version = '[VI]{version}[/VI]'
 export * as TypeGuards from './util/type-guards'
 export { toValue, createTrie, Trie, toPromise, toValueSync, assert, LiquidError, ParseError, RenderError, UndefinedVariableError, TokenizationError, AssertionError } from './util'
+export type { LiquidErrors } from './util/error'
 export { Drop } from './drop'
+export type { Comparable } from './drop'
 export { Emitter } from './emitters'
 export { defaultOperators, Operators, evalToken, evalQuotedToken, Expression, isFalsy, isTruthy } from './render'
 export { Context, Scope } from './context'
 export { Value, Hash, Template, FilterImplOptions, Tag, Filter, Output, Variable, VariableLocation, VariableSegments, Variables, StaticAnalysis, StaticAnalysisOptions, analyze, analyzeSync, Arguments, PartialScope } from './template'
+export type { TagRenderReturn } from './template'
 export { Token, TopLevelToken, TagToken, ValueToken } from './tokens'
 export type { RangeToken, LiteralToken, QuotedToken, PropertyAccessToken, NumberToken } from './tokens'
 export { TokenKind, Tokenizer, ParseStream, Parser } from './parser'
 export { filters } from './filters'
 export * from './tags'
-export { defaultOptions, LiquidOptions } from './liquid-options'
-export { FS } from './fs'
+export { defaultOptions } from './liquid-options'
+export type { LiquidOptions, RenderOptions, RenderFileOptions } from './liquid-options'
+export { FS, LookupType } from './fs'
 export { Liquid } from './liquid'