title: RIDK install: error: database 'mingw32' is not valid (invalid or corrupted database (PGP signature))
body: <p>I get this error when trying to install MSYS2/MINGW:</p>
  <pre><code>&gt;ridk install
     1 - MSYS2 base installation
     2 - MSYS2 system update
     3 - MSYS2 and MINGW development toolchain
  
  Which components shall be installed? If unsure press ENTER [1,2,3] 3
  
  MSYS2 seems to be already installed
  Install MSYS2 and MINGW development toolchain ...
  &gt; pacman -S --needed --noconfirm autoconf autoconf2.13 autogen automake-wrapper automake1.10 automake1.11 automake1.12 automake1.13 automake1.14 automake1.15 automake1.6 automake1.7 automake1.8 automake1.9 diffutils file gawk grep libtool m4 make patch pkg-config sed texinfo texinfo-tex wget mingw-w64-x86_64-binutils mingw-w64-x86_64-crt-git mingw-w64-x86_64-gcc mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-headers-git mingw-w64-x86_64-libmangle-git mingw-w64-x86_64-libwinpthread-git mingw-w64-x86_64-make mingw-w64-x86_64-pkg-config mingw-w64-x86_64-tools-git mingw-w64-x86_64-winpthreads-git
  error: mingw32: signature from &quot;David Macek &lt;david.macek.0@gmail.com&gt;&quot; is marginal trust
  error: mingw64: signature from &quot;David Macek &lt;david.macek.0@gmail.com&gt;&quot; is marginal trust
  error: msys: signature from &quot;David Macek &lt;david.macek.0@gmail.com&gt;&quot; is marginal trust
  error: database 'mingw32' is not valid (invalid or corrupted database (PGP signature))
  error: database 'mingw64' is not valid (invalid or corrupted database (PGP signature))
  error: database 'msys' is not valid (invalid or corrupted database (PGP signature))
  Install MSYS2 and MINGW development toolchain failed
  Installation failed: pacman failed
  </code></pre>