update to ocaml 5.1 (#527)

Author: kmarker1101

.github/Dockerfile

@@ -1,38 +1,38 @@
-FROM ocaml/opam:debian-11-ocaml-4.14-afl
+FROM ocaml/opam:debian-11-ocaml-5.1-afl
 
 USER root
 
 RUN apt-get update \
- && apt-get install -y m4 bmake cpio net-tools fswatch pkg-config \
- && rm -rf /var/lib/apt/lists/*
+    && apt-get install -y m4 bmake cpio net-tools fswatch pkg-config \
+    && rm -rf /var/lib/apt/lists/*
 
 RUN git config --global --add safe.directory "*"
 
 RUN cd /home/opam/opam-repository \
- && git pull origin master
+    && git pull origin master
 
 RUN opam update \
- && opam install core \
-                 core_unix \
-                 merlin \
-                 yaml \
-                 ezjsonm \
-                 mustache \
-                 dune \
-                 fpath \
-                 ocamlfind \
-                 ounit \
-                 ounit2 \
-                 qcheck \
-                 react \
-                 ppx_deriving \
-                 ppx_let \
-                 ppx_sexp_conv \
-                 yojson \
-                 ocp-indent \
-                 calendar \
-                 getopts \
-                 stdio
+    && opam install core \
+    core_unix \
+    merlin \
+    yaml \
+    ezjsonm \
+    mustache \
+    dune \
+    fpath \
+    ocamlfind \
+    ounit \
+    ounit2 \
+    qcheck \
+    react \
+    ppx_deriving \
+    ppx_let \
+    ppx_sexp_conv \
+    yojson \
+    ocp-indent \
+    calendar \
+    getopt \
+    stdio
 
-ENV PATH="/home/opam/.opam/4.14/bin:${PATH}" \
-    MAKESYSPATH=/usr/share/bmake/mk-bmake
+ENV PATH="/home/opam/.opam/5.1/bin:${PATH}" \
+    MAKESYSPATH=/usr/share/bmake/mk-bmake

README.md

@@ -15,7 +15,7 @@ notes contain a few details specific to Ocaml.
 
 **Prerequesites**
 
-* OCaml `4.07`
+* OCaml `5.1`
 * opam
 * make