Replace alpine3.10 image with alpine3.12

Author: tyranron

.travis.yml

@@ -7,8 +7,8 @@ env:
   - VERSION=1.44.0 VARIANT=stretch/slim
   - VERSION=1.44.0 VARIANT=buster
   - VERSION=1.44.0 VARIANT=buster/slim
-  - VERSION=1.44.0 VARIANT=alpine3.10
   - VERSION=1.44.0 VARIANT=alpine3.11
+  - VERSION=1.44.0 VARIANT=alpine3.12
 #VERSIONS
 
 install:

1.44.0/alpine3.10/Dockerfile renamed to 1.44.0/alpine3.12/Dockerfile

@@ -1,4 +1,4 @@
-FROM alpine:3.10
+FROM alpine:3.12
 
 RUN apk add --no-cache \
         ca-certificates \

x.py

@@ -26,11 +26,11 @@
 default_debian_variant = "buster"
 
 alpine_versions = [
-    "3.10",
     "3.11",
+    "3.12",
 ]
 
-default_alpine_version = "3.11"
+default_alpine_version = "3.12"
 
 def rustup_hash(arch):
     url = f"https://static.rust-lang.org/rustup/archive/{rustup_version}/{arch}/rustup-init.sha256"