Import WAV file fails #307
Description
It seems that you can no longer load WAV files:
julia> import FileIO
julia> FileIO.load("whatever-file.wav")
┌ Error: There was an error in magic function detectwav.
│ Please open an issue at FileIO.jl.
│ exception =
│ UndefVarError: submagic not defined
│ Stacktrace:
│ [1] detectwav(::IOStream) at /usr/local/lib/julia/packages/FileIO/ajK7j/src/registry.jl:173
│ [2] match(::IOStream, ::Function) at /usr/local/lib/julia/packages/FileIO/ajK7j/src/query.jl:143
│ [3] (::FileIO.var"#5#9"{Symbol})(::IOStream) at /usr/local/lib/julia/packages/FileIO/ajK7j/src/query.jl:94
│ [4] open(::FileIO.var"#5#9"{Symbol}, ::String; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at ./io.jl:325
│ [5] open at ./io.jl:323 [inlined]
│ [6] querysym(::String; checkfile::Bool) at /usr/local/lib/julia/packages/FileIO/ajK7j/src/query.jl:93
│ [7] querysym at /usr/local/lib/julia/packages/FileIO/ajK7j/src/query.jl:83 [inlined]
│ [8] load(::String; options::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at /usr/local/lib/julia/packages/FileIO/ajK7j/src/loadsave.jl:111
│ [9] load(::String) at /usr/local/lib/julia/packages/FileIO/ajK7j/src/loadsave.jl:110
│ [10] top-level scope at REPL[2]:1
│ [11] eval(::Module, ::Any) at ./boot.jl:331
│ [12] eval_user_input(::Any, ::REPL.REPLBackend) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/REPL/src/REPL.jl:134
│ [13] repl_backend_loop(::REPL.REPLBackend) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/REPL/src/REPL.jl:195
│ [14] start_repl_backend(::REPL.REPLBackend, ::Any) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/REPL/src/REPL.jl:180
│ [15] run_repl(::REPL.AbstractREPL, ::Any; backend_on_current_task::Bool) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/REPL/src/REPL.jl:292
│ [16] run_repl(::REPL.AbstractREPL, ::Any) at /Users/julia/buildbot/worker/package_macos64/build/usr/share/julia/stdlib/v1.5/REPL/src/REPL.jl:288
│ [17] (::Base.var"#807#809"{Bool,Bool,Bool,Bool})(::Module) at ./client.jl:399
│ [18] #invokelatest#1 at ./essentials.jl:710 [inlined]
│ [19] invokelatest at ./essentials.jl:709 [inlined]
│ [20] run_main_repl(::Bool, ::Bool, ::Bool, ::Bool, ::Bool) at ./client.jl:383
│ [21] exec_options(::Base.JLOptions) at ./client.jl:313
│ [22] _start() at ./client.jl:506
└ @ FileIO /usr/local/lib/julia/packages/FileIO/ajK7j/src/query.jl:145
┌