build: Move nlohmann-json to build dependencies (#2218)

nlohmann-json is a headers-only library, so there's no runtime
requirement for it.

dist/Arch/PKGBUILD

@@ -8,8 +8,8 @@ pkgdesc="A Hex Editor for Reverse Engineers, Programmers and people who value th
 arch=("x86_64")
 url="https://github.com/WerWolv/ImHex"
 license=('GPL2')
-depends=(glfw mbedtls fontconfig freetype2 libglvnd dbus gtk3 curl fmt yara nlohmann-json zlib bzip2 xz zstd)
-makedepends=(git)
+depends=(glfw mbedtls fontconfig freetype2 libglvnd dbus gtk3 curl fmt yara zlib bzip2 xz zstd)
+makedepends=(git nlohmann-json)
 provides=(imhex)
 conflicts=(imhex)
 source=("$url/releases/download/v$pkgver/imhex-$pkgver-ArchLinux-x86_64.pkg.tar.zst")

dist/ImHex-9999.ebuild

@@ -21,7 +21,6 @@ RDEPEND="${DEPEND}
 		media-libs/glfw
 		sys-apps/file
 		net-libs/mbedtls
-		dev-cpp/nlohmann_json
 		sys-apps/dbus
 		sys-apps/xdg-desktop-portal
 		sys-libs/zlib
@@ -30,4 +29,6 @@ RDEPEND="${DEPEND}
 		app-arch/zstd
 		app-arch/lz4
 		"
-BDEPEND="${DEPEND}"
+BDEPEND="${DEPEND}
+		dev-cpp/nlohmann_json
+		"