Upgraded jsonnet requirement from 0.14.0 to 0.15.0

Signed-off-by: Marco Pracucci <marco@pracucci.com>

Author: pracucci

.circleci/config.yml

@@ -10,14 +10,14 @@ workflows:
 jobs:
   lint:
     docker:
-      - image: grafana/cortex-jsonnet-build-image:e6474c5
+      - image: grafana/cortex-jsonnet-build-image:387f7ca
     steps:
       - checkout
       - run: make lint
 
   build:
     docker:
-      - image: grafana/cortex-jsonnet-build-image:e6474c5
+      - image: grafana/cortex-jsonnet-build-image:387f7ca
     steps:
       - checkout
       - run: make build-mixin

build-image/Dockerfile

@@ -2,7 +2,7 @@
 FROM alpine:3.11 AS jsonnet-builder
 RUN apk add --no-cache git make g++
 RUN git clone https://github.com/google/jsonnet && \
-    git  -C jsonnet checkout v0.14.0 && \
+    git  -C jsonnet checkout v0.15.0 && \
     make -C jsonnet 2LDFLAGS=-static && \
     cp jsonnet/jsonnet /usr/bin && \
     cp jsonnet/jsonnetfmt /usr/bin