Add script for bumping the version (#7)

* Ignore backup copies of package.json in Git

* Add script for bumping the version

.gitignore

@@ -1,4 +1,5 @@
 node_modules/
 coverage/
 planitar-rnfs-untar-*.tgz
+package.json.*
 .*.sw[a-z]*

script/bump-version.sh

@@ -0,0 +1,64 @@
+#!/usr/bin/env bash
+
+set -e
+
+if [ -z "$1" ]; then
+  echo "Usage: $0 <major|minor|patch>"
+  exit 1
+fi
+
+if [ ! -f package.json ]; then
+  echo 'Error: package.json not found'
+  echo ''
+  echo 'Run this script from the root of the repository'
+  exit 1
+fi
+
+if [[ -n "$(git status --porcelain --untracked-files=no)" ]]; then
+  echo 'Error: Working directory is not clean'
+  echo ''
+  echo 'Commit or stash your changes before running this script'
+  exit 1
+fi
+
+case "$1" in
+major)
+  jqExpr='.version |= ((split(".") | .[0] | tonumber + 1 | tostring) + ".0.0")'
+  ;;
+
+minor)
+  jqExpr='.version |= ((split(".") | .[0] + "." + (.[1] | tonumber + 1 | tostring) + ".0"))'
+  ;;
+
+patch)
+  jqExpr='.version |= ((split(".") | .[0] + "." + .[1] + "." + (.[2] | tonumber + 1 | tostring)))'
+  ;;
+
+*)
+  echo "Usage: $0 <major|minor|patch>"
+  exit 1
+  ;;
+esac
+
+jq --indent 2 "${jqExpr}" package.json >package.json.tmp
+mv package.json package.json.bak
+mv package.json.tmp package.json
+
+npm i
+
+
+gitTag="v$(jq -r .version package.json)"
+
+echo ''
+echo 'Done'
+echo ''
+echo '1. Review and commit the changes:'
+git status -s
+git diff package.json
+echo ''
+echo '2. Tag the release:'
+echo "  git tag -a ${gitTag} -m '${gitTag}'"
+echo ''
+echo '3. Publish the release:'
+echo "  git push origin ${gitTag}"
+echo '  npm publish'