Add trajectories for incineration rates for plastic waste

[mellamoSimon]

Adds required functions and a mapping to create an input file with incineration rates for plastic waste, using data from PBL's Steggman et.al.

[fbenke-pik]

Please make sure lucode2::buildLibrary() succeeds and the version is incremented. This should also include fixing remaining linter warnings.

[0UmfHxcvx5J7JoaOhFSs5mncnisTJJ6q]

                         `Plastics|Waste|Total`
                         ",
       units = "fraction", only.new = TRUE
-      ) %>%
-      # remove unused dimensions
-    select(c(-model,-scenario,-variable,-unit)) %>%
-    interpolate_missing_periods(seq(2050,2060,5),method = "linear")
+    ) %>%
+    # remove unused dimensions
+    select(-"model", -"scenario", -"variable", -"unit") %>%
+    interpolate_missing_periods(seq(2050, 2060, 5), method = "linear")
 
   # as magpie
   x <- as.magpie(incinerationShares)

[mellamoSimon]

thank you!