ignore color formatting with custom titleFormatter

[jdelman]

fixes #215

[codecov-io]

Codecov Report

Merging #216 into master will increase coverage by 0.23%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #216      +/-   ##
==========================================
+ Coverage   67.91%   68.14%   +0.23%     
==========================================
  Files           5        5              
  Lines         134      135       +1     
==========================================
+ Hits           91       92       +1     
  Misses         43       43

Impacted Files	Coverage Δ
src/core.js	78.33% <66.66%> (+0.36%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 993c896...a04a28a. Read the comment docs.

[imevro]

thx

[cooperka]

I actually quite liked the new colors! I simply added %c a couple times in my custom titleFormatter string and it colored my output properly.

@evgenyrodionov is there any way to keep the colors AND use a custom formatter now? After this PR my colors are broken again (3.0.1). Otherwise I'll make a PR.