Database lesson

[AydinHassan]

TODO

• [x] - Rebase
• [x] - Do something a bit more challenging with output, (concat names, age groups, select all over 20)
• [x] - Ask to update some values, use SelfCheck to verify data was updated.
• [x] - Alter query binding to use execute parameters
• [x] - Unit Tests
• [x] - Problem
• [x] - Create Trait for common lesson tasks eg getTemporaryPath()
• [x] - Create Abstract lesson which implements getSolution() & getProblem() based on class name. Implement empty tearDown() method

[codecov-io]

Current coverage is 100.00%

Merging #13 into master will not affect coverage as of 5c00dcc

@@            master     #13   diff @@
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  Files            9      10     +1
  Stmts          175     205    +30
  Branches         0       0       
  Methods         42      48     +6
======================================
+ Hit            175     205    +30
  Partial          0       0       
  Missed           0       0       

Review entire Coverage Diff as of 5c00dcc

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[AydinHassan]

Requires https://github.com/php-school/php-workshop/pull/45

[AydinHassan]

@mikeymike Ready for review, will need to switch php-workshop dependency back, one other PR is merged.

[mikeymike]

@AydinHassan Really nice man, works really well using DatabaseExerciseCheck :heart: