fix(deps): update dependency logform to v2

[renovate]

This PR contains the following updates:

Package	Type	Update	Change	References
logform	dependencies	major	^1.10.0 -> ^2.0.0	source

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Release Notes

winstonjs/logform

v2.0.0

Compare Source

2018/12/23

• BREAKING [#​57] Try better fix for [winston#​1485]. See:
  New splat behavior` below.
• [#​54] Fix typo in README.md
• [#​55] Strip info[LEVEL] in prettyPrint. Fixes [#​31].
• [#​56] Document built-in formats.
• [#​64] Add TypeScript definitions for all format options.
  Relates to [#​9] and [#​48].

New splat behavior

Previously splat would have added a meta property for any additional
info[SPLAT] beyond the expected number of tokens.

As of [email protected], format.splat assumes additional splat paramters
(aka "metas") are objects and merges enumerable properties into the info.
e.g.

const { format } = require('logform');
const { splat } = format;
const { MESSAGE, LEVEL, SPLAT } = require('triple-beam');

console.log(
  // Expects two tokens, but three splat parameters provided.
  splat().transform({
    level: 'info',
    message: 'Let us %s for %j',
    [LEVEL]: 'info',
    [MESSAGE]: 'Let us %s for %j',
    [SPLAT]: ['objects', { label: 'sure' }, { thisIsMeta: 'wut' }]
  })
);

// [email protected] behavior:
// Added "meta" property.
//
// { level: 'info',
//   message: 'Let us objects for {"label":"sure"}',
//   meta: { thisIsMeta: 'wut' },
//   [Symbol(level)]: 'info',
//   [Symbol(message)]: 'Let us %s for %j',
//   [Symbol(splat)]: [ 'objects', { label: 'sure' } ] }

// [email protected] behavior:
// Enumerable properties assigned into `info`.
//
// { level: 'info',
//   message: 'Let us objects for {"label":"sure"}',
//   thisIsMeta: 'wut',
//   [Symbol(level)]: 'info',
//   [Symbol(message)]: 'Let us %s for %j',
//   [Symbol(splat)]: [ 'objects', { label: 'sure' } ] }

The reason for this change is to be consistent with how winston itself
handles meta objects in its variable-arity conventions.

BE ADVISED previous "metas" that were not objects will very likely lead
to odd behavior. e.g.

const { format } = require('logform');
const { splat } = format;
const { MESSAGE, LEVEL, SPLAT } = require('triple-beam');

console.log(
  // Expects two tokens, but three splat parameters provided.
  splat().transform({
    level: 'info',
    message: 'Let us %s for %j',
    [LEVEL]: 'info',
    [MESSAGE]: 'Let us %s for %j',
    // !!NOTICE!! Additional parameters are a string and an Array
    [SPLAT]: ['objects', { label: 'sure' }, 'lol', ['ok', 'why']]
  })
);

// [email protected] behavior:
// Added "meta" property.
//
// { level: 'info',
//   message: 'Let us objects for {"label":"sure"}',
//   meta: ['lol', ['ok', 'why']],
//   [Symbol(level)]: 'info',
//   [Symbol(message)]: 'Let us %s for %j',
//   [Symbol(splat)]: [ 'objects', { label: 'sure' } ] }

// [email protected] behavior: Enumerable properties assigned into `info`.
// **Strings and Arrays only have NUMERIC enumerable properties!**
//
// { '0': 'ok',
//   '1': 'why',
//   '2': 'l',
//   level: 'info',
//   message: 'Let us objects for {"label":"sure"}',
//   [Symbol(level)]: 'info',
//   [Symbol(message)]: 'Let us %s for %j',
//   [Symbol(splat)]: [ 'objects', { label: 'sure' } ] }

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