v0.3.7

Important notice: this release drops Python 2 support

new defaults:

• support for submodules (@han190)
• formatting of end statements (@helmutwecke)
• indentation for forall and where (@helmutwecke)
• indentation rules for fypp preprocessor statements (@helmutwecke)

fixes:

• support for multiline strings
• parsing of +/- in addition/subtraction

New options:

• --config-file for custom configuration file (@ellio167)
• --diff (@jhaiduce)
• --exclude to exclude files from recursive file search (@jhaiduce)
• --case letter case formatting of Fortran intrinsics (@meteokid)
• --disable-indent-mod disable indentation after module / program
• --enable-decl whitespace formatting for variable declarations (::)