Suggest private vars and add :deprecated key

[eval]

This PR adds two things:

• the earlier discussed suggestion of private vars when using #'some-ns/,,,
• adding a :deprecated key to suggested vars and functions

[codecov-commenter]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.02 :tada:

Comparison is base (ba4f21b) 93.10% compared to head (b2d7a7e) 93.13%.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #98 +/- ## ========================================== + Coverage 93.10% 93.13% +0.02% ========================================== Files 11 11 Lines 740 743 +3 Branches 28 28 ========================================== + Hits 689 692 +3 Misses 23 23 Partials 28 28 ``` | [Impacted Files](https://app.codecov.io/gh/alexander-yakushev/compliment/pull/98?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alexander+Yakushev) | Coverage Δ | | |---|---|---| | [src/compliment/sources/ns\_mappings.clj](https://app.codecov.io/gh/alexander-yakushev/compliment/pull/98?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Alexander+Yakushev#diff-c3JjL2NvbXBsaW1lbnQvc291cmNlcy9uc19tYXBwaW5ncy5jbGo=) | `89.65% <100.00%> (+0.36%)` | :arrow_up: |

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[eval]

Closing as GH keeps telling about merge-conflicts which were solved...