message: Bugfix: Remove dependency of ImplicitGrid's from axom::IndexType
  This was introduced through an implicit default parameter in one of its slam::Set types.
diff: @@ -70,7 +70,7 @@ public:
  using BitsetType = slam::BitSet;
  - using BinBitMap = slam::Map<slam::Set<>, BitsetType>;
  + using BinBitMap = slam::Map<slam::Set<IndexType,IndexType>, BitsetType>;
  /*!
  * \brief Default constructor for an ImplicitGrid
  @@ -178,7 +178,7 @@ public:
  // ensure that resolution in each dimension is at least one
  for(int i=0 ; i< NDIMS ; ++i)
  {
  - m_gridRes[i] = axom::utilities::max( m_gridRes[i], 1);
  + m_gridRes[i] = axom::utilities::max( m_gridRes[i], IndexType(1));
  }
  // Setup lattice
  @@ -190,7 +190,7 @@ public:
  for(int i=0 ; i<NDIMS ; ++i)
  {
  m_bins[i] = BinSet(m_gridRes[i]);
  - m_binData[i] = BinBitMap(&m_bins[i], BitsetType(m_elementSet.size()));
  + m_binData[i] = BinBitMap(&m_bins[i], BitsetType(numElts));
  }
  // Set the expansion factor for each element to a small fraction of the
  