libssh2: 1.7.0

Update package to latest version.  Add validpgpkeys.

libssh2/PKGBUILD

@@ -1,7 +1,7 @@
 # Maintainer: Alexey Pavlov <alexpux@gmail.com>
 
 pkgname=('libssh2' 'libssh2-devel')
-pkgver=1.6.0
+pkgver=1.7.0
 pkgrel=1
 pkgdesc="A library implementing the SSH2 protocol as defined by Internet Drafts"
 url="https://libssh2.org/"
@@ -13,10 +13,11 @@ options=('!libtool')
 source=("https://libssh2.org/download/${pkgname}-${pkgver}.tar.gz"{,.asc}
         1.2.7-cygwin.patch
         libssh2-1.4.3-msys2.patch)
-sha256sums=('5a202943a34a1d82a1c31f74094f2453c207bf9936093867f41414968c8e8215'
+sha256sums=('e4561fd43a50539a8c2ceb37841691baf03ecb7daf043766da1b112e4280d584'
             'SKIP'
             '894937383ec281301cc15464e07cd518e5f1093fd46c41e1bb7d1f2b0ed1a4df'
             '0b8fc2e9ccf45f2e174e1e5350a9e05fe3c1da6b7b5b42aab0e06d979d11d1f4')
+validpgpkeys=('914C533DF9B2ADA2204F586D78E11C6B279D5C91')
 
 prepare() {
   cd "${pkgname}-${pkgver}"