Move from psr-0 to psr-4

[divine]

The time has come, we need to finally move from psr-0 to psr-4.

This change wouldn't be a breaking change and everything should fine.

cc @Smolevich

Thanks!

[codecov-commenter]

Codecov Report

Merging #2247 (0a08d50) into master (7406a3b) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #2247   +/-   ##
=========================================
  Coverage     86.88%   86.88%           
  Complexity      664      664           
=========================================
  Files            33       33           
  Lines          1556     1556           
=========================================
  Hits           1352     1352           
  Misses          204      204           

Impacted Files	Coverage Δ	Complexity Δ
src/Auth/DatabaseTokenRepository.php	0.00% <ø> (ø)	8.00 <0.00> (?)
src/Auth/PasswordBrokerManager.php	0.00% <ø> (ø)	1.00 <0.00> (?)
src/Auth/PasswordResetServiceProvider.php	33.33% <ø> (ø)	2.00 <0.00> (?)
src/Auth/User.php	0.00% <ø> (ø)	0.00 <0.00> (?)
src/Collection.php	89.47% <ø> (ø)	5.00 <0.00> (?)
src/Connection.php	88.73% <ø> (ø)	39.00 <0.00> (?)
src/Eloquent/Builder.php	87.93% <ø> (ø)	22.00 <0.00> (?)
src/Eloquent/EmbedsRelations.php	100.00% <ø> (ø)	8.00 <0.00> (?)
src/Eloquent/HybridRelations.php	93.58% <ø> (ø)	34.00 <0.00> (?)
src/Eloquent/Model.php	93.63% <ø> (ø)	83.00 <0.00> (?)
... and 23 more

---

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 7406a3b...0a08d50. Read the comment docs.