change ActivityLogHelper from function to static method

[valeriySeregin]

No description provided.

[codecov-io]

Codecov Report

Merging #648 (6425113) into master (c66353e) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #648      +/-   ##
============================================
+ Coverage     83.21%   83.23%   +0.02%     
- Complexity      136      138       +2     
============================================
  Files            53       54       +1     
  Lines           679      680       +1     
============================================
+ Hits            565      566       +1     
  Misses          114      114              

Impacted Files	Coverage Δ	Complexity Δ
app/Helpers/ActivityLogHelper.php	100.00% <100.00%> (ø)	1.00 <1.00> (+1.00)
app/Providers/ActivityLogProvider.php	100.00% <100.00%> (ø)	1.00 <1.00> (?)

---

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 c66353e...6425113. Read the comment docs.