[librsvg: 1/5] Bump minimum Rust version to 1.58, for gitlab_clippy

[Marge Bot <marge-bot src gnome org>]

commit 84850308dd373201b9bbd10a06285569a9f1eb5d
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Jul 20 09:32:23 2022 -0500

    Bump minimum Rust version to 1.58, for gitlab_clippy
    
    Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/723>

 COMPILING.md            | 2 +-
 ci/container_builds.yml | 4 ++--
 configure.ac            | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/COMPILING.md b/COMPILING.md
index d77c5e770..747bd9493 100644
--- a/COMPILING.md
+++ b/COMPILING.md
@@ -31,7 +31,7 @@ minimum version is listed here; you may use a newer version instead.
 **Compilers:**
 
 * a C compiler and `make` tool; we recommend GNU `make`.
-* rust 1.56 or later
+* rust 1.58 or later
 * cargo
 
 **Mandatory dependencies:**
diff --git a/ci/container_builds.yml b/ci/container_builds.yml
index 8198eae0d..ba6d2768b 100644
--- a/ci/container_builds.yml
+++ b/ci/container_builds.yml
@@ -6,9 +6,9 @@ include:
 variables:
   # When branching change the suffix to avoid conflicts with images
   # from the main branch
-  BASE_TAG: "2022-07-14.0-main"
+  BASE_TAG: "2022-08-02.0-main"
   RUST_STABLE: "1.58.1"
-  RUST_MINIMUM: "1.56.1"
+  RUST_MINIMUM: "1.58.1"
 
 .container.opensuse@common:
   stage: "container-build"
diff --git a/configure.ac b/configure.ac
index 7765f90a7..1b125296c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -107,7 +107,7 @@ AS_IF(test x$RUSTC = xno,
 
 dnl MSRV - Minimum Supported Rust Version
 dnl If you change this, please update COMPILING.md
-MINIMUM_RUST_VER=1.56
+MINIMUM_RUST_VER=1.58
 rust_version=`$RUSTC --version | sed -e 's/^rustc //g'`
 AX_COMPARE_VERSION([$rust_version],[lt],[$MINIMUM_RUST_VER], [
     AC_MSG_ERROR([librsvg needs at least rustc version $MINIMUM_RUST_VER])