Travis-CI: update pip before installation
Travis-CI: update pip before installation
convercraft/NNPACK,microblink/NNPACK,convercraft/NNPACK,microblink/NNPACK,microblink/NNPACK,Maratyszcza/NNPACK,Maratyszcza/NNPACK,convercraft/NNPACK,convercraft/NNPACK,Maratyszcza/NNPACK,microblink/NNPACK,Maratyszcza/NNPACK