Fix double-free in edit functionality (double-closing file handle).

private/version.nim

@@ -1 +1 @@
-const PTK_VERSION* = "1.0.2"
+const PTK_VERSION* = "1.0.3"

ptk.nim

@@ -144,6 +144,7 @@ proc edit(mark: var Mark): void =
 # notes for this timeline mark.""")
 
     close(tempFile)
+    tempFile = nil
 
     discard os.execShellCmd "$EDITOR " & tempFileName & " </dev/tty >/dev/tty"
 

ptk.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "1.0.2"
+version       = "1.0.3"
 author        = "Jonathan Bernard"
 description   = "Personal Time Keeper"
 license       = "MIT"