verbose printing for find_zero

[ChrisRackauckas]

No description provided.

[coveralls]

Coverage remained the same at 70.895% when pulling 3bec70a on false_position into 336cfe5 on master.

[codecov]

Codecov Report

Merging #52 into master will decrease coverage by 0.02%.
The diff coverage is 75%.

@@            Coverage Diff             @@
##           master      #52      +/-   ##
==========================================
- Coverage   70.89%   70.87%   -0.03%     
==========================================
  Files          26       26              
  Lines        2223     2235      +12     
==========================================
+ Hits         1576     1584       +8     
- Misses        647      651       +4

Impacted Files	Coverage Δ
src/integrators/integrator_interface.jl	50.27% <75%> (+1.17%)	⬆️
src/caches/rossler_caches.jl	89% <0%> (ø)	⬆️

---

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 336cfe5...9b012b4. Read the comment docs.

[coveralls]

Coverage increased (+0.04%) to 70.934% when pulling 965f778 on false_position into 336cfe5 on master.

[coveralls]

Coverage increased (+0.05%) to 70.947% when pulling 965f778 on false_position into 336cfe5 on master.

[coveralls]

Coverage decreased (-0.02%) to 70.872% when pulling 9b012b4 on false_position into 336cfe5 on master.