Added a script to update the version number

scripts/set-version.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+set -eux
+
+cd "$(dirname $0)/.."
+
+VERSION="$1"
+IFS=".-" read MAJOR MINOR REVISION EXTRA < <(echo "$VERSION")
+TAG="v$VERSION"
+UNDERLINE=$(printf -- '-%.0s' $(seq 1 ${#TAG}))
+
+sed -i~ -bE "4s/HEAD/$TAG/; 5s/-+/$UNDERLINE/" CHANGELOG.md
+rm CHANGELOG.md*~
+sed -i~ -bE "s/\"version\":.*$/\"version\": \"$VERSION\",/" library.json
+rm library.json*~
+
+sed -i~ -bE "s/version=.*$/version=$VERSION/" library.properties
+rm library.properties*~
+
+sed -i~ -bE \
+	-e "s/ARDUINOJSON_VERSION .*$/ARDUINOJSON_VERSION \"$VERSION\"/" \
+	-e "s/ARDUINOJSON_VERSION_MAJOR .*$/ARDUINOJSON_VERSION_MAJOR $MAJOR/" \
+	-e "s/ARDUINOJSON_VERSION_MINOR .*$/ARDUINOJSON_VERSION_MINOR $MINOR/" \
+	-e "s/ARDUINOJSON_VERSION_REVISION .*$/ARDUINOJSON_VERSION_REVISION $REVISION/" \
+	src/ArduinoJson/version.hpp
+rm src/ArduinoJson/version.hpp*~