Bump fastimage from 2.2.2 to 2.2.3 (#15819)

Bumps [fastimage](https://github.com/sdsykes/fastimage) from 2.2.2 to 2.2.3.
- [Release notes](https://github.com/sdsykes/fastimage/releases)
- [Commits](https://github.com/sdsykes/fastimage/compare/v2.2.2...v2.2.3

)

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Gemfile.lock

@@ -218,7 +218,7 @@ GEM
       ruby2_keywords
     faraday-net_http (1.0.1)
     fast_blank (1.0.0)
-    fastimage (2.2.2)
+    fastimage (2.2.3)
     ffi (1.10.0)
     ffi-compiler (1.0.1)
       ffi (>= 1.0.0)