fix(pagination): don't hide single page number with ellipsis (#1235)

[reduckted]

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Fixes #1235.

I haven't implemented the complex change of logic that was talked about in this comment, but I have fixed the simple case where a single page number was replaced with an ellipsis. I thought that fixing this would be better than nothing. 😁

You can see this change of behavior in the demo under the Advanced pagination section.

• The first pagination component would hide page 11 when the selected page was anywhere from 6 to 10.
• The second pagination component would hide page 2 when the selected page was 5.
• The second pagination component would hide page 11 when the selected page was 8.

[codecov-io]

Codecov Report

Merging #3419 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #3419      +/-   ##
==========================================
+ Coverage   91.05%   91.07%   +0.01%     
==========================================
  Files          95       95              
  Lines        2774     2778       +4     
  Branches      515      517       +2     
==========================================
+ Hits         2526     2530       +4     
  Misses        189      189              
  Partials       59       59

Flag	Coverage Δ
#e2e	55.47% <0%> (-0.08%)	⬇️
#unit	88.14% <100%> (+0.01%)	⬆️

Impacted Files	Coverage Δ
src/pagination/pagination.ts	100% <100%> (ø)	⬆️

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[maxokorokov]

LGTM, thanks for the PR, @reduckted.