Update to Swift 5.1.5

Author: Andrea-Scuderi

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
-FROM swift:5.1.4
+FROM swift:5.1.5
 
 # Or your actual UID, GID on Linux if not the default 1000
 ARG USERNAME=vscode

Makefile

@@ -1,4 +1,4 @@
-SWIFT_VERSION?=5.1.4
+SWIFT_VERSION?=5.1.5
 
 DOCKER_TAG=nio-swift:$(SWIFT_VERSION)
 SWIFT_DOCKER_IMAGE=$(DOCKER_TAG)

docker/5.1.4/Dockerfile docker/5.1.5/Dockerfiledocker/5.1.4/Dockerfile renamed to docker/5.1.5/Dockerfile

@@ -1,4 +1,4 @@
-FROM swift:5.1.4 as builder
+FROM swift:5.1.5 as builder
 
 RUN apt-get -qq update && apt-get -q -y install \
     libssl-dev libicu-dev