Update README and bump version for v1.4.0 release

Signed-off-by: Joachim Wiberg <[email protected]>

Makefile

@@ -5,7 +5,7 @@
 # Set CC and CFGLAGS in your local environment for a suitable
 # compiler (tcc?) and CFLAGS (-Os -W -Wall -Werror).
 
-VERSION        = 1.3.0
+VERSION        = 1.4.0
 CFG_OPTS      ?= -DENABLE_SCORE -DENABLE_PREVIEW -DENABLE_HIGH_SCORE
 CC            ?= @gcc
 CPPFLAGS      += $(CFG_OPTS)

README.md

@@ -14,13 +14,13 @@ Issue tracker and GIT repository available at GitHub:
   * [Repository][]
   * [Issue Tracker][]
   * [Docker Image](https://ghcr.io/troglobit/tetris)
-  * [tetris-1.3.0.tar.bz2][tarball], [MD5][], [SHA256][]
+  * [tetris-1.4.0.tar.gz][tarball], [MD5][], [SHA256][]
 
 
 Docker Image
 ------------
 
-Pre-built Docker images are available from [ghcr.io][] as of the v1.3.0
+Pre-built Docker images are available from [ghcr.io][] as of the v1.4.0
 release.  Previous releases available on <https://hub.dockercom>.  The
 [GIT repository][repository] has a `Dockerfile` for building your own
 image from the source tree:
@@ -54,6 +54,6 @@ This human-readable "clone" is maintained by [Joachim Wiberg][].
 [Repository]:      https://github.com/troglobit/tetris
 [Issue Tracker]:   https://github.com/troglobit/tetris/issues
 [Joachim Wiberg]:  https://troglobit.com
-[tarball]:         https://ftp.troglobit.com/tetris/tetris-1.3.0.tar.bz2
-[MD5]:             https://ftp.troglobit.com/tetris/tetris-1.3.0.tar.bz2.md5
-[SHA256]:          https://ftp.troglobit.com/tetris/tetris-1.3.0.tar.bz2.sha256
+[tarball]:         https://ftp.troglobit.com/tetris/tetris-1.4.0.tar.gz
+[MD5]:             https://ftp.troglobit.com/tetris/tetris-1.4.0.tar.gz.md5
+[SHA256]:          https://ftp.troglobit.com/tetris/tetris-1.4.0.tar.gz.sha256