Bump ring-core to 1.8.0 (#12028)

* Bump ring-core to 1.8.0

* Fix Docker CI build

https://github.com/technomancy/leiningen/issues/2658#issuecomment-593716154

Dockerfile

@@ -17,7 +17,7 @@ ENV LC_CTYPE en_US.UTF-8
 # make:    backend building
 # gettext: translations
 
-RUN apk add --update bash yarn git wget make gettext
+RUN apk add --update coreutils bash yarn git wget make gettext
 
 # lein:    backend dependencies and building
 ADD https://raw.github.com/technomancy/leiningen/stable/bin/lein /usr/local/bin/lein

project.clj

@@ -128,7 +128,7 @@
    [prismatic/schema "1.1.11"]                                        ; Data schema declaration and validation library
    [puppetlabs/i18n "0.8.0"]                                          ; Internationalization library
    [redux "0.1.4"]                                                    ; Utility functions for building and composing transducers
-   [ring/ring-core "1.7.1"]
+   [ring/ring-core "1.8.0"]
    [ring/ring-jetty-adapter "1.7.1"]                                  ; Ring adapter using Jetty webserver (used to run a Ring server for unit tests)
    [ring/ring-json "0.4.0"]                                           ; Ring middleware for reading/writing JSON automatically
    [stencil "0.5.0"]                                                  ; Mustache templates for Clojure