Update version numbers etc for 1.5.3

Author: james-d-mitchell

.VERSION

@@ -1 +1 @@
-1.5.2
+1.5.3

CHANGELOG.md

@@ -4,6 +4,15 @@ Wilf A. Wilson, Michael Young et al.
 
 Licensing information can be found in the `LICENSE` file.
 
+## Version 1.5.3 (released 20/05/2022)
+
+This is a minor release including the following changes:
+
+* digraph: fix String method for chains/cycles by @james-d-mitchell in https://github.com/digraphs/Digraphs/pull/542
+* Disable edge labels if not already set in some cases by @james-d-mitchell in https://github.com/digraphs/Digraphs/pull/540
+* build: remove the default flag -march=native by @james-d-mitchell in https://github.com/digraphs/Digraphs/pull/541
+* doc: fix typos by @james-d-mitchell in https://github.com/digraphs/Digraphs/pull/544
+
 ## Version 1.5.2 (released 30/03/2022)
 
 This is a very minor release containing technical changes for maintaining compatibility with other GAP packages.

PackageInfo.g

@@ -9,14 +9,14 @@
 ##
 
 ##  <#GAPDoc Label="PKGVERSIONDATA">
-##  <!ENTITY VERSION                  "1.5.2">
+##  <!ENTITY VERSION                  "1.5.3">
 ##  <!ENTITY GAPVERS                  "4.10.0">
 ##  <!ENTITY GRAPEVERS                "4.8.1">
 ##  <!ENTITY IOVERS                   "4.5.1">
 ##  <!ENTITY ORBVERS                  "4.8.2">
 ##  <!ENTITY DATASTRUCTURESVERS       "0.2.5">
 ##  <!ENTITY NAUTYTRACESINTERFACEVERS "0.2">
-##  <!ENTITY ARCHIVENAME    "digraphs-1.5.2">
+##  <!ENTITY ARCHIVENAME    "digraphs-1.5.3">
 ##  <!ENTITY COPYRIGHTYEARS "2014-22">
 ##  <#/GAPDoc>
 
@@ -28,8 +28,8 @@ _STANDREWSCS := Concatenation(["Jack Cole Building, North Haugh, ",
 SetPackageInfo(rec(
 PackageName := "Digraphs",
 Subtitle := "Graphs, digraphs, and multidigraphs in GAP",
-Version := "1.5.2",
-Date := "30/03/2022",  # dd/mm/yyyy format
+Version := "1.5.3",
+Date := "20/05/2022",  # dd/mm/yyyy format
 License := "GPL-3.0-or-later",
 ArchiveFormats := ".tar.gz",
 

VERSIONS

@@ -8,6 +8,7 @@
 #############################################################################
 ##
 
+release 1.5.3 - 20/05/2022
 release 1.5.2 - 30/03/2022
 release 1.5.1 - 29/03/2022
 release 1.5.0 - 27/10/2021