build fails on Ubuntu 18.04.3 LTS

[kokjinsam]

Here's the step I took:

> git clone https://github.com/revery-ui/reason-font-manager

> cd reason-font-manager

> esy install

> esy build

info esy build 0.5.8 (using package.json)
info building [email protected]@d41d8cd9
info building @opam/conf-m4@opam:1@da6f4f44
info building @opam/conf-m4@opam:1@da6f4f44: done
.
. (truncated)
.
gcc src/FontManagerLinux.o (exit 1)
(cd _build/default/src && /usr/bin/gcc -I /home/sammkj/.esy/3___________________________________________________________________/i/ocaml-4.8.1000-e74c5c0d/lib/ocaml -fPIC -lstdc++ -g -o FontManagerLinux.o -c FontManagerLinux.cpp)
FontManagerLinux.cpp:3:10: fatal error: fontconfig/fontconfig.h: No such file or directory
 #include <fontconfig/fontconfig.h>
          ^~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
error: command failed: 'refmterr' 'dune' 'build' '-p' 'reason-font-manager' (exited with 1)
esy-build-package: exiting with errors above...
error: build failed with exit code: 1
  
esy: exiting due to errors above

Related issue: revery-ui/revery-quick-start#40