Update spring boot 2.1 to 2.2

[pine]

ref.

• Change default Freemarker template file extension to .ftlh to enable HTML escaping spring-projects/spring-boot#15131
• https://freemarker.apache.org/docs/dgui_misc_autoescaping.html

[codecov]

Codecov Report

Merging #6 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master       #6   +/-   ##
=========================================
  Coverage     85.16%   85.16%           
  Complexity       44       44           
=========================================
  Files            17       17           
  Lines           182      182           
  Branches          2        2           
=========================================
  Hits            155      155           
  Misses           26       26           
  Partials          1        1

Impacted Files	Coverage Δ	Complexity Δ
...moe/pine/profile/filters/HtmlCompressorFilter.java	80% <ø> (ø)	3 <0> (ø)	⬇️

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