Add bump.sh script to master branch too

scripts/bump.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+if [ -z "$1" ]; then
+    echo "Usage: $0 VERSION" >&2
+    exit 1
+fi
+
+VERSION=$1
+
+if ! echo $VERSION | grep "^[0-9.]"; then
+    echo "invalid version";
+    exit 1
+fi
+
+cd $(dirname $0)/..
+
+sed -i 's/(defconst ghc-version ".*")/(defconst ghc-version "'"$VERSION"'")/' \
+    elisp/ghc.el
+
+sed -r -i 's/^(Version:[[:space:]]*)[0-9.]+/\1'"$VERSION"'/' ghc-mod.cabal
+
+( tac ChangeLog; echo "\n$(date '+%Y-%m-%d') v$VERSION" ) | tac \
+    > ChangeLog.tmp
+
+mv ChangeLog.tmp ChangeLog
+
+emacs -q -nw ChangeLog
+
+git add ChangeLog elisp/ghc.el ghc-mod.cabal
+git commit -m "Bump version to $VERSION"
+git tag "v$VERSION"