Fix "tutorial" (typo & verbosity list issue)

[Laurae2]

This PR fixes:

• The verbosity error as default in buildEdgeMatrix (it was using a list as default instead of a boolean)
• The typo in the "tutorial" about "buildWijMaatrix" instead of "buildWijMatrix"

[elbamos]

@Laurae2 I'm just seeing this now. If you want to resubmit this so its against the current master, I'll accept the PR. Thanks!

[Laurae2]

Rebased against master, you can squash and merge all the commits into one while merging as one of your commits was similar to mines.

It leaves all the typos "buildWijMaatrix" fixed in commits (I thought I merged all of them, seems it didn't - you should have squash and merge so it becomes only one commit at the time of merging branches).

I can squash together all the commits myself if the squash & merge is not available in this repo.

[elbamos]

Can you clear the CI failures? Also, could you make the pull against branch hdbscan? That's going to be 0.1.8

[codecov-io]

Current coverage is 75.00% (diff: 100%)

Merging #18 into hdbscan will not change coverage

@@            hdbscan        #18   diff @@
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  Files             6          6          
  Lines           264        264          
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
  Hits            198        198          
  Misses           66         66          
  Partials          0          0          

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[Laurae2]

Fixed the issue making check failing and changed the pull to hdbscan as requested. Builds are passing.