refactor(options): pass unprocessed options to Formatter and parse …

…in its constructor

src/bunyan-pretty-stream.ts

@@ -1,7 +1,7 @@
-import { Options, schema } from './options';
 import { Transform, TransformCallback } from 'stream';
 import { fromString, isBunyanRecord } from './bunyan-record';
 import { Formatter } from './formatter';
+import { Options } from './options';
 import is from '@sindresorhus/is';
 
 class PrettyStream extends Transform {
@@ -10,7 +10,7 @@ class PrettyStream extends Transform {
   constructor(options: Options = {}) {
     super({ objectMode: true });
 
-    this._formatter = new Formatter(schema.parse(options));
+    this._formatter = new Formatter(options);
   }
 
   _transform(

src/formatter.ts

@@ -1,5 +1,5 @@
 import { BunyanRecord, coreFields } from './bunyan-record';
-import { ParsedOptions } from './options';
+import { Options, ParsedOptions, schema } from './options';
 import bunyan from 'bunyan';
 import chalk from 'chalk';
 import is from '@sindresorhus/is';
@@ -48,9 +48,10 @@ class Formatter {
   } as const;
   private readonly _levels: Readonly<Record<number, string>>;
 
-  constructor(options: ParsedOptions) {
-    options.basePath = path.normalize(options.basePath);
-    this._options = options;
+  constructor(options: Options) {
+    const parsedOptions = schema.parse(options);
+    parsedOptions.basePath = path.normalize(parsedOptions.basePath);
+    this._options = parsedOptions;
 
     this._levels = {
       [bunyan.levelFromName.trace]: chalk.gray('TRACE'),