unexpected '' (T_ENCAPSED_AND_WHITESPACE) with PHP 7.1 and 7.2

[leonstr]

With PHP 7.2 you get Exception - syntax error, unexpected '' (T_ENCAPSED_AND_WHITESPACE), expecting '-' or identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING). See forum post Google meet Plugin Add activity issue.

[leonstr]

Prior to PHP 7.3.0, the closing identifier of a HEREDOC string must begin in the first column of the line.

Added PR #39 to fix this.