test(set): TTL

testdata/set__err__with__invalid-ttl.ct

@@ -0,0 +1,12 @@
+$ pda set a b --ttl 3343r --> FAIL
+Error: invalid argument "3343r" for "-t, --ttl" flag: time: unknown unit "r" in duration "3343r"
+Usage:
+  pda set KEY[@DB] [VALUE] [flags]
+
+Aliases:
+  set, s
+
+Flags:
+  -h, --help           help for set
+      --secret         Mark the stored value as a secret
+  -t, --ttl duration   Expire the key after the provided duration (e.g. 24h, 30m)

testdata/set__ok__with__secret_ttl.ct

@@ -0,0 +1 @@
+$ pda set a b --secret --ttl 10m

testdata/set__ok__with__ttl.ct

@@ -0,0 +1 @@
+$ pda set a b --ttl 30m