Add exercises to the practice command

The '-e/--exercises' has also been introduced to instruct the 'practice'
command to only go for exercises, and the '-k/--kind' flag allows the
user to further filter which kind of exercise to practice.

Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 15999db..9ee4d24 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -49,6 +49,7 @@ dependencies = [
  "mihi",
  "serde",
  "serde_json",
+ "tempfile",
 ]
 
 [[package]]