vim-patch:8.1.0313: information about a swap file is unavailable

Problem:    Information about a swap file is unavailable.
Solution:   Add swapinfo(). (Enzo Ferber)
00f123a565

src/nvim/eval.lua

@@ -301,6 +301,7 @@ return {
     strwidth={args=1},
     submatch={args={1, 2}},
     substitute={args=4},
+    swapinfo={args={1}},
     synID={args=3},
     synIDattr={args={2, 3}},
     synIDtrans={args=1},