Fixing small typos

[bthaqi]

There are a few typos in English. A few small fixes are included.

[codecov]

Codecov Report

Merging #162 into master will decrease coverage by 0.08%.
The diff coverage is 100%.

@@ Coverage Diff @@## master #162 +/- ##
==========================================
- Coverage 96.55% 96.46% -0.09% 
==========================================
Files 14 14 Lines 1075 1076 +1 ==========================================
Hits 1038 1038 - Misses 37 38 +1

Impacted Files	Coverage Δ
jose/jwk.py	93.97% <100%> (-1.15%)	⬇️

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[blag]

Please fix the merge conflicts, but otherwise this looks good.

[blag]

Thanks!

[bthaqi]

Sure! Thank you too! :)

…

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