Improve VersionMismatch error message

[nyurik]

The current error is a bit unclear, so added some clarification of which version is which.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (aeaacc4) 81.05% compared to head (3ef4fd7) 81.05%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1422   +/-   ##
=======================================
  Coverage   81.05%   81.05%           
=======================================
  Files          51       51           
  Lines       10348    10348           
=======================================
  Hits         8388     8388           
  Misses       1960     1960           

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[gwenn]

You should not try to guess sqlite3_version.
Which is not (easily) comparable.
Hence the use of sqlite3_libversion_number.

[nyurik]

@gwenn i'm not "guessing" it for comparison reason, just formatting it for ease-of reading. Much better than simply print raw number i think

[gwenn]

@gwenn i'm not "guessing" it for comparison reason, just formatting it for ease-of reading. Much better than simply print raw number i think

For me,
https://github.com/rusqlite/rusqlite/pull/1422/files#diff-068438172230084847676a638395a6ee9914094c2cb2d76f2c5de07f0d136ad4R285 tries to guess the sqlite3_version (or at least could be mistaken as the sqlite3_version)

[nyurik]

@gwenn would you be ok with the first revision of this PR -- it simply prints the number with some context: 017d91d

[nyurik]

@gwenn friendly ping with above question. Thx!