feat: add bigint support (#41)

* feat: add bigint support

* style: update linter to support ES2020

* style: lint --fix

index.js

@@ -12,6 +12,7 @@ import inspectDate from './lib/date'
 import inspectFunction from './lib/function'
 import inspectMap from './lib/map'
 import inspectNumber from './lib/number'
+import inspectBigInt from './lib/bigint'
 import inspectRegExp from './lib/regexp'
 import inspectSet from './lib/set'
 import inspectString from './lib/string'
@@ -47,6 +48,9 @@ const baseTypesMap = {
   number: inspectNumber,
   Number: inspectNumber,
 
+  bigint: inspectBigInt,
+  BigInt: inspectBigInt,
+
   string: inspectString,
   String: inspectString,
 

lib/bigint.js

@@ -0,0 +1,7 @@
+import { truncate, truncator } from './helpers'
+
+export default function inspectBigInt(number, options) {
+  let nums = truncate(number.toString(), options.truncate - 1)
+  if (nums !== truncator) nums += 'n'
+  return options.stylize(nums, 'bigint')
+}

lib/helpers.js

@@ -33,6 +33,7 @@ const ansiColors = {
 const styles = {
   special: 'cyan',
   number: 'yellow',
+  bigint: 'yellow',
   boolean: 'yellow',
   undefined: 'grey',
   null: 'bold',