Bump version to 0.1.3

This change bumps the version of the crate to 0.1.3. The following
notable changes have been made since 0.1.2:
- Removed default "all" query (very first query; capturing all tasks)
  - If still desired, can be configured manually
- Added support for searching in reverse order
  - '?' starts a reverse search
  - 'N' continues the existing search in reverse
- Added support for writing output to a file supplied by path as the
  first argument
  - E.g., notnow /dev/pts/3 will display the output on tty 3
- Fixed stack overflow due to endless loop when searching for a string
  that is not found on multiple tabs

CHANGELOG.md

@@ -1,5 +1,5 @@
-Unreleased
-----------
+0.1.3
+-----
 - Removed default "all" query (very first query; capturing all tasks)
   - If still desired, can be configured manually
 - Added support for searching in reverse order

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "notnow"
-version = "0.1.2"
+version = "0.1.3"
 authors = ["Daniel Mueller <deso@posteo.net>"]
 license = "GPL-3.0+"
 homepage = "https://github.com/d-e-s-o/notnow"