gopls/internal/govulncheck: sync x/vuln@4eb5ba4
gopls/internal/govulncheck: sync x/vuln@4eb5ba4

Change-Id: Idf2147684626368116a5330fefb0a63d8c82f7a9
Reviewed-on: https://go-review.googlesource.com/c/tools/+/412456
Run-TryBot: Hyang-Ah Hana Kim <d7e82c3c07f92613bcbf9a1e88f6b96c13caa3b0@gmail.com>
gopls-CI: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Reviewed-by: Jonathan Amsterdam <e3d3698b2ccd5955e4adf250d0785062d0f9018b@google.com>
TryBot-Result: Gopher Robot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

golang/tools,golang/tools,golang/tools,golang/tools,golang/tools