Boost\libs\numeric\ublas failed to build due to error C2059, C2065, C2923, C2976, C2447 .... on MSVC

**Issue Description:**
Boost\libs\numeric\ublas failed to build due to error C2059, C2065, C2923, C2976, C2447 .... on MSVC. Could you please take a look? The master branch commit we used is a1552ab. Thanks.

**Build Steps:**

1. git clone -c core.autocrlf=true --recursive ​https://github.com/boostorg/boost.git boost
2. open a VS 2019 x86 command prompt and browse to boost
3. .\bootstrap
4. .\b2 headers variant=release --build-dir=..\out\x86rel address-model=32
5. .\b2 variant=release --build-dir=..\out\x86rel address-model=32
6. .\b2 -j16 variant=release --build-dir=..\out\x86rel libs\numeric\ublas\test

**Error Info:**
test_tensor.cpp
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(215): error C2059: syntax error: ''template<''
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): error C2065: 'size_type': undeclared identifier
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): error C2923: 'std::vector': 'size_type' is not a valid template type argument for parameter '_Ty'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): note: see declaration of 'size_type'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): error C2976: 'std::vector': too few template arguments
C:\Program Files (x86)\Microsoft Visual Studio\2019\Enterprise\VC\Tools\MSVC\14.29.30133\include\vector(496): note: see declaration of 'std::vector'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): error C2065: 'size_type': undeclared identifier
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): error C2065: 'layout_type': undeclared identifier
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): error C2923: 'boost::numeric::ublas::basic_strides': 'size_type' is not a valid template type argument for parameter '__int_type'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): note: see declaration of 'size_type'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): error C2923: 'boost::numeric::ublas::basic_strides': 'layout_type' is not a valid template type argument for parameter '__layout'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(216): note: see declaration of 'layout_type'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(217): error C2143: syntax error: missing ';' before '{'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(217): error C2447: '{': missing function header (old-style formal list?)
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(235): error C2059: syntax error: ''template<''
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(235): error C2059: syntax error: '...'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(236): error C2065: 'layout_type': undeclared identifier
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(236): error C2923: 'boost::numeric::ublas::basic_strides': 'layout_type' is not a valid template type argument for parameter '__layout'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(236): note: see declaration of 'layout_type'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(237): error C2143: syntax error: missing ';' before '{'
F:\gitP\boostorg\boost\boost\numeric\ublas\tensor\strides.hpp(237): error C2447: '{': missing function header (old-style formal list?)
.\boost/numeric/ublas/tensor/tensor.hpp(333): error C2059: syntax error: ''template<''
.\boost/numeric/ublas/tensor/tensor.hpp(726): note: see reference to class template instantiation 'boost::numeric::ublas::tensor' being compiled
.\boost/numeric/ublas/tensor/tensor.hpp(334): error C2065: 'other_layout': undeclared identifier
.\boost/numeric/ublas/tensor/tensor.hpp(334): error C2923: 'boost::numeric::ublas::tensor': 'other_layout' is not a valid template type argument for parameter 'F'
.\boost/numeric/ublas/tensor/tensor.hpp(334): note: see declaration of 'other_layout'
.\boost/numeric/ublas/tensor/tensor.hpp(334): error C2976: 'boost::numeric::ublas::tensor': too few template arguments
.\boost/numeric/ublas/tensor/tensor.hpp(79): note: see declaration of 'boost::numeric::ublas::tensor'
.\boost/numeric/ublas/tensor/tensor.hpp(335): error C2334: unexpected token(s) preceding ':'; skipping apparent function body
.\boost/numeric/ublas/tensor/tensor.hpp(30): fatal error C1075: '{': no matching token found

**Detailed log file:**
[test.log.8.log](https://github.com/boostorg/ublas/files/8851066/test.log.8.log)