added bumpversion

.bumpversion.cfg

@@ -0,0 +1,7 @@
+[bumpversion]
+current_version = 0.1.1
+
+[bumpversion:file:package.json]
+
+[bumpversion:file:package-lock.json]
+

bumpversion.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+
+set -x
+set -e
+
+usage(){
+  echo "Usage: $0 {major|minor|patch} [--tag]"
+  exit 1
+}
+
+if ! [ -x "$(command -v bumpversion)" ]; then
+  echo 'Error: bumpversion is not installed.' >&2
+  exit 1
+elif ! git diff-index --quiet HEAD -- >/dev/null 2>&1; then
+  echo 'There are local changes in your the git repository. Please commit or stash them before bumping version.' >&2
+  exit 1
+fi
+
+if [ "$#" -lt 1 ]; then
+    echo "Illegal number of parameters"
+    usage
+elif [[ $1 != 'major' && $1 != 'minor' && $1 != 'patch' ]]; then
+    echo 'First argument must be {major|minor|patch}'
+    usage
+fi
+
+if [[ $2 == '--tag' ]]; then
+  if git branch --contains $(git rev-parse --verify HEAD) | grep -E 'master'; then
+    bumpversion --tag --commit $1
+  else
+    echo "Only master tags can be tagged"
+    exit 1
+  fi
+else
+  bumpversion $1
+fi